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MATH 533 (new) Focus Dreams/uophelp.com

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MATH 533 (new) Focus Dreams/uophelp.com

MATH 533 Entire Course (New)

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- MATH 533 Week 1 Homework
- MATH 533 Week 1 Quiz
- MATH 533 Week 2 DQ 1 Case Let's Make a Deal
- MATH 533 Week 2 Homework (2 Sets)
- MATH 533 Week 2 Quiz

MATH 533 (new) Focus Dreams/uophelp.com

MATH 533 Final Exam Set 1 (New)

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- (TCO D) PuttingPeople2Work has a growing business placing out-of-work MBAs. They claim they can place a client in a job in their field in less than 36 weeks. You are given the following data from a sample.
- Sample size: 100
- Population standard deviation: 5
- Sample mean: 34.2
- Formulate a hypothesis test to evaluate the claim. (Points : 10)

MATH 533 (new) Focus Dreams/uophelp.com

MATH 533 Final Exam Set 2 (New)

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- 1. (TCO A) Seventeen salespeople reported the following number of sales calls completed last month.
- 72 93 82 81 82 97 102 107 119
- 86 88 91 83 93 73 100 102
- a. Compute the mean, median, mode, and standard deviation, Q1, Q3, Min, and Max for the above sample data on number of sales calls per month.

MATH 533 (new) Focus Dreams/uophelp.com

MATH 533 Week 1 Homework (New)

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- 1. Complete the table to the right.
- 2. In one university, language incorporated a 10-week extensive reading program to improve students’ Japanese reading comprehension. The professors collected 267 books originally written for Japanese children and required their students to read at least 40 of them as part of the grade in the course. The books were categorized into reading levels (color-coded for easy selection) according to length and complexity. Complete parts a through c.
- 3. Convert the relative frequency bar graph into a Pareto diagram. Interpret the graph. Choose the correct graph below.
- 4. Consider the stem-and-leaf display to the right.

MATH 533 (new) Focus Dreams/uophelp.com

MATH 533 Week 1 Quiz (New)

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- 1. Graph the relative frequency histogram for the 300 measurements summarized in the relative frequency table to the right.
- 2. Would you expect the data sets that follow to possess relative frequency distributions that are symmetric, skewed to the right, or skewed to the left? Explain. Complete parts a through c below.
- 3. Consider the following sample of five measurements.
- 3, 4, 5, 2, 6

MATH 533 (new) Focus Dreams/uophelp.com

MATH 533 Week 2 DQ 1 Case Let's Make a Deal (New)

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- A number of years ago, there was a popular television game show called Let's Make a Deal. The host, Monty Hall, would randomly select contestants from the audience and, as the title suggests, he would make deals for prizes. Contestants would be given relatively modest prizes and then would be offered the opportunity to risk that prize to win better ones.
- Suppose you are a contestant on this show. Monty has just given you a free trip worth $500 to a locale that is of little interest to you. He now offers you a trade: Give up the trip in exchange for a gamble. On the stage are three curtains, A, B, and C. Behind one of them is a brand-new car worth $45,000. Behind the other two curtains, the stage is empty.

MATH 533 (new) Focus Dreams/uophelp.com

MATH 533 Week 2 Homework (2 Sets) (New)

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- 1. The table to the right gives a breakdown of 2,149 civil cases that were appealed. The outcome of the appeal, as well as the type of trial (judge or jury), was determined for each case. Suppose one of the cases is selected at random and the outcome of the appeal and type of trial are observed.
- 2. Zoologists investigated the likelihood of fallow deer bucks during the mating season. Researchers recorded 163 encounters between two bucks, one of which clearly initiated the encounter with the other. In these 163 initiated encounters, the zoologists kept track or not a physical contact fight occurred and whether the initiator ultimately won or lost the encounter. Suppose we select one of these 163 encounters and note the outcome (fight status and winner). Complete parts a through c.

MATH 533 (new) Focus Dreams/uophelp.com

MATH 533 Week 2 Quiz (New)

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- 1. A country’s government has devoted considerable funding to missile defense research over the past 20 years. The latest development is the Space-Based Infrared System (SBIRS), which uses satellite imagery to detect and track missiles. The probability that an intruding object (e.g., a missile) will be detected on a flight track by SBIRS is 0.6. Consider a sample of 10 simulated tracks, each with an intruding object. Let x equal the number of these tracks where SBIRS detects the object. Complete parts a through d.
- 2. According to a consumer survey of young adults (18-24 years of age) who shop online, 18% own mobile phone with internet access. In a random sample of 200 young adults who shop online, let x be the numbers who own a mobile phone with internet access.

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MATH 533 Week 3 DQ 1 Ethics in Statistics Readings and Discussion (New)

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- Why is it important to study ethics in statistics? Have you seen statistics misused? Without naming specific companies or people, can you provide examples?
- Please find (on the Internet or from the Keller library) and post an article regarding ethics and statistics. Please attach the article, or provide its link in your post, together with a brief summary of the article in your own words. Be sure to use quotation marks around any words taken directly from the article (not to do so constitutes “plagiarism”). Then, in a separate post, review one or more articles posted by other students and provide the other student or students with your reflections (don’t just agree or disagree).

MATH 533 (new) Focus Dreams/uophelp.com

MATH 533 Week 3 Homework (New)

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- 1. The mean gas mileage for a hybrid car is 56 miles per gallon. Suppose that the gasoline mileage is approximately normally distributed with a standard deviation of 3.3 miles per gallon.
- 2. The ages of a group of 50 women are approximately normally distributed with a mean of 49 years and a standard deviation of 5 years. One woman is randomly selected from the group, and her age is observed.
- 3. Resource Reservation Protocol (RSVP) was originally designed to establish signaling links for stationary networks. RSVP was applied to mobile wireless technology. A simulation study revealed that the transmission delay (measured in milliseconds) of an RSVP linked wireless device has an approximate normal distribution with mean µ = 49.5 milliseconds and milliseconds. Complete parts a and b.

MATH 533 (new) Focus Dreams/uophelp.com

MATH 533 Week 3 Quiz (2 Sets) (New)

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- 1. The average salary for a certain profession is $97,000. Assume that the standard deviation of such salaries is $33,500. Consider a random sample of 54 people in this profession and let x represent the mean salary for the sample.
- 2. Almost all companies utilize some type of year-end performance review for their employees. Human Resources (HR) at a university’s Health Science Center provides guidelines for supervisors rating their subordinates. For example, raters are advised to examine their ratings for a tendency to be either too lenient or too harsh. According to HR, “if you have this tendency, consider using a normal distribution-----10% of employees (rated) exemplary, 20% distinguished, 40% competent, 20% marginal, and 10% unacceptable “Suppose you are rating an employee’s performance on a scale of 1 (lowest) to 100 (highest). Also, assume the ratings follow a normal distribution with a mean of 50 and a standard deviation of 16. Complete parts a and b.

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MATH 533 Week 4 DQ 1 Case Statistics in Action Medicare Fraud Investigations (New)

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- Read the selection in your textbook pertaining to the Case: Statistics in Action: Medicare Fraud Investigations; load the data set for the case, MCFRAUD, into Minitab; answer the question about the case in the Discussion area; and likewise read and respond to the follow-on selections in the textbook for the case in the Statistics in Action Revisited.
- What is a point estimate of the mean overpayment?

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MATH 533 Week 4 Homework (New)

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- 1. Health Care workers who use latex gloves with glove powder on a daily basis are particularly susceptible to developing a latex allergy. Each in a sample of 43 hospital employees who were diagnosed with a latex allergy based on a skin-prick test reported on their exposure to latex gloves. Summary statistics for the number of latex gloves used per week are x = 19.4 and s = 12.3. Complete parts (a) – (d).
- 2. The white wood material used for the roof of an ancient temple is imported from a certain country. The wooden roof must withstand as much as 100 centimeters of snow in the winter. Architects at a university conducted a study to estimate the mean bending strength of the white wood roof. A sample of 25 pieces of the imported wood were tested and yielded the statistics x = 74.9 and s = 10.8 on breaking strength of the white wood with a 99% confidence interval. Interpret the result.

MATH 533 (new) Focus Dreams/uophelp.com

MATH 533 Week 4 Quiz (2 Sets) (New)

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- 1. A random samples of 1020 satellite radio subscribers were asked, “Do you have a satellite radio receiver in your car?” The survey found that 102 subscribers did, in fact, have a satellite receiver in their car.
- 2. Each child in a sample of 64 low-income children was administered a language and communication exam. The sentence complexity scores had a mean of 7.62 and a standard deviation of 8.91. Complete parts a through d.
- 3. In a sample of 60 stores of a certain company, 50 violated a scanner accuracy standard. It has been demonstrated that the conditions for a valid large-sample confidence interval for the true proportion of the stores that violate the standard were not met. Determine the number of stores that must be sampled in order to estimate the true proportion to within 0.05 with 95% confidence using the large-sample method.

MATH 533 (new) Focus Dreams/uophelp.com

MATH 533 Week 5 DQ 1 Case Statistics in Action: Diary of a Kleenex User (New)

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- Read the selection in your text book pertaining to the Case: Statistics in Action: Diary of a Kleenex® User; load the data set for the case, TISSUES, into Minitab; answer the question about the case in the Discussion area; and likewise read and respond to the follow-on selections in the textbook for the case in the Statistics in Action Revisited.
- How would you briefly summarize the case, and the data that was generated?

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MATH 533 Week 5 Homework (New)

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- 1. A study of n = 90,000 first-time candidates for an exam found that the number of semester hours of college credit taken by the sampled candidates is summarized by x = 145.72 and s = 18.53. A professor claims that the true mean number of semester hours of college credit taken is 145.
- 2. A study of n = 59 hospital employees found that the number of latex gloves used per week by the sampled worker is summarized by x = 21.2 and s = 13.1. Let µ represent the mean number of latex gloves used per week by all hospital employees. Consider testing

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MATH 533 Week 5 Quiz (New)

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1. A group of professors investigated first-year college students’ knowledge of astronomy. One concept of interest was the Big Bang Theory of the creation of the universe. In a sample 0f 141 freshman students, 35 believed that the Big Bang Theory accurately described the creation of plantery systems. Baesd on this information, is it correct at the α = 0.01 level of significance to state that more than 20% of all freshman college students believe the Big Bang theory describes the creation of planetary systems?

2. A study was conducted to evaluate the effectiveness of a new mosquito repellent designed by the U.S. Army to be applied as camouflage face paint. The repellent was applied to the forearms of 5 volunteers who then were exposed to 15 active mosquitos for a 10-hour period. The percentage of the forearm surface area protected from bites (called percent repellency) was calculated for each of the five volunteers. For one color of paint (loam), the following summary statistics were obtained: x =83%, s = 14%. Complete parts a and b.

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MATH 533 Week 6 Course Project Part B Hypothesis Testing and Confidence Intervals (SALESCALL Project) (New)

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- Your Instructor will provide you with four manager speculations, a.-d., in the Doc Sharing file.
- Using the sample data, perform the hypothesis test for each of the above situations in order to see if there is evidence to support your manager’s belief in each case a.-d. In each case use the Seven Elements of a Test of Hypothesis, in Section 6.2 of your text book, using the α provided by your Instructor in the Doc Sharing materials, and explain your conclusion in simple terms. Also be sure to compute the p-value and interpret.
- Follow this up with computing confidence intervals (the required confidence level will be provided by your Instructor) for each of the variables described in a.-d., and again interpreting these intervals.

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MATH 533 Week 6 DQ 1 Case: Statistics in Action: Legal Advertising—Does It Pay (New)

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- Read the Case: Statistics In Action: Legal Advertising—Does It Pay?, and answer the following questions. (The case is included in your textbook, Chapter 10.) The data set for the case study is LEGALADV, and it is available in your textbook resources, so you don't have to enter the data!
- Summarize what the case is about, and what the variables represent.

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MATH 533 Week 6 Homework (New)

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- 1. A MINITAB printout relating the size of the diamond (number of carats) to the asking price (dollars) for 308 diamonds is shown below. Complete parts a through e.
- 2. The average driving distance (yards) and driving accuracy (percent of drives that land in the fairway) for 8 golfers are recorded in the table to the right. Complete parts a through e below.
- 3. Many entrepreneurs have donated money to various causes. Data on the total amount pledged and remaining net worth for the 10 top donors are given in the table. Complete parts a through d.

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MATH 533 Week 6 Quiz (New)

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- 1. An association was formed by students to protest labor exploitation in the apparel industry. There were 18 student “sit-ins” for a “sweet-free campus” organized at several universities. Data were collected for the duration (in days) of each sit-in, as well as the number of student arrests. The data for 5 sit-ins in which there was at least one arrest and the results of a simple linear regression are found below. Let y be the number of arrests and x be the duration. Complete parts a through d.
- 2. A group of researchers developed a new method for ranking the total driving performance of golfers on a tour. The main average driving distance (yards) and driving accuracy (percent of drives that land in the fairway). They construct a standard accuracy (y) to driving distance (x). A MINITAB printout with prediction and confidence intervals for a driving distance.

MATH 533 (new) Focus Dreams/uophelp.com

MATH 533 Week 7 Course Project Part C: Regression and Correlation Analysis (SALESCALL Project) (New)

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- Your Instructor will specify for you the dependent variable and the independent variables in your Case and data. Using MINITAB perform the regression and correlation analysis for the data by answering the following.
- Generate a scatterplot for the specified dependent variable and the specified independent variable, including the graph of the "best fit" line. Interpret.
- Determine the equation of the "best fit" line, which describes the relationship between the dependent variable and the selected independent variable.
- Determine the coefficient of correlation. Interpret.

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MATH 533 Week 7 DQ 1 Case: Statistics in Action: Bid-Rigging in the Highway Construction Industry (New)

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- Read the Case: Statistics in Action: Bid-Rigging in the Highway Construction Industry, in Chapter 11 of your textbook, and answer the following questions. The data set, FLAG, for the case study is available in the publisher’s website, so you don’t need to enter the data into Minitab by hand.
- What is this case about? Describe the key variables.

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MATH 533 Week 7 Homework (New)

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- 1. Researchers developed a safety performance function (SPF), which estimates the probability of occurrence of a crash for a given segment of roadway. Using data on over 100 segments of roadway, they fit the model E(y) = + + , where y = number of crashes per three years, = roadway length (miles), and = average annual daily traffic (number of vehicles) = AADT.
- 2. The data shown below represent the annual earnings (y), age (, and hours worked per day (x2) for a random sample of street vendors in a certain. Complete parts a through f.

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MATH 533 Week 7 Quiz (New)

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- 1. Data on the average annual precipitation (y), altitude (x1), latitude (x2), and distance from the coast (x3) for a particular state were collected for 10 meteorological stations. The observations are listed in the table below. Consider the first-order model y = + + , + ε. Complete parts a through c.
- 2. Researchers developed a safety performance function (SPF), which estimates the probability of occurrence of a crash for a given segment of roadway. Using data on over 100 segments of roadway, they fit the model E(y) = + + , where y = number of crashes per three years, x1 = roadway length (miles), and x2 = average annual daily traffic (number of vehicles) = AADT.

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