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## Homework Quiz 9/30

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**Homework Quiz 9/30**• Find the standard deviation of: 8, 4, 3, 2**Relative Standing and Boxplots**Section 3-4**Agenda**• z-Scores • Finding Percentile • Finding Quartiles • Box Plots • Interquartile Range • Modified Box Plots**Agenda**• z-Scores • Finding Percentile • Finding Quartiles • Box Plots • Interquartile Range • Modified Box Plots**Example**• A man is 76.2 in tall and 237.1 lb heavy. Which of these measurements is more extreme? • Consider that the mean height is 68.34 in with a standard deviation of 3.02 in. Also the mean weight is 172.55 lb with a standard deviation of 26.33 lb. ROUND-OFF RULE: Round z-Scores to the nearest hundredth, as that is how they are typically plugged into statistical tables.**z Scores and Usual Values**Whenever a data value is less than the mean, its corresponding z score is negative.**Agenda**• z-Scores • Finding Percentiles • Finding Quartiles • Box Plots • Interquartile Range • Modified Box Plots**Percentile**ROUND-OFF RULE: Round off to the nearest whole number.**Example**• The scores on the most recent quiz are posted in the table below. Assume you are the person that scored a 93, and calculate your percentile.**Agenda**• z-Scores • Finding Percentile • Finding Quartiles • Box Plots • Interquartile Range • Modified Box Plots**Quartiles**ROUND-OFF RULE: Round L to the nearest whole number unless it is exactly at .5, then find the average of the #’s it is in between.**Example**Find the 5-Number Summary for the following data set:**Homework**• P.127-128: #7, 8, 15-18, 27(only complete 5 # summary)**Section 3.4**Day 2**Homework Quiz 10/2**• Write down all of your work for problem #8**Agenda**• z-Scores • Finding Percentile • Finding Quartiles • Box Plots • Interquartile Range • Modified Box Plots**Agenda**• z-Scores • Finding Percentile • Finding Quartiles • Box Plots • Interquartile Range • Modified Box Plots**Example**• Create a box plot using the following data about the number of times Abenasolved a rubik’s cube in a single minute.**Critical Thinking**• Compare the given data sets Each plot represents a different lottery years and the average earnings for the winning contestants. Lottery 1 is in 2010 Lottery 2 is in 2011 Lottery 3 is in 2012**Critical Thinking**• Compare the given data sets**Agenda**• z-Scores • Finding Percentile • Finding Quartiles • Box Plots • Interquartile Range • Modified Box Plots**Agenda**• z-Scores • Finding Percentile • Finding Quartiles • Box Plots • Interquartile Range • Modified Box Plots**Example**• Create a modified box plot using the following data about the number of times Ms. P served an ace against Mitch after school at the tennis courts.**Homework**• P.126-128: #4, 11, 14, 27, 28