Unit 1 let s get started
This presentation is the property of its rightful owner.
Sponsored Links
1 / 19

Unit 1: Let’s Get Started PowerPoint PPT Presentation


  • 82 Views
  • Uploaded on
  • Presentation posted in: General

Unit 1: Let’s Get Started. Day 2 Notes Where is this used? Who thought of this? Statistics today…. We see on TV…. 4 out of 5 doctors recommend…. We see on TV…. Obama leads by 3% (+ or – 4 %). Statistics is….

Download Presentation

Unit 1: Let’s Get Started

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript


Unit 1 let s get started

Unit 1: Let’s Get Started

Day 2 Notes

Where is this used? Who thought of this?

Statistics today…


We see on tv

We see on TV…

4 out of 5 doctors recommend…


We see on tv1

We see on TV…

Obama leads by 3% (+ or – 4 %)


A way to convert numbers into useful information so that good decisions can be made

Statistics is…

A way to convert numbers into useful information so that good decisions can be made.


Unit 1 let s get started

  • How are statistics used today?

Manufacturing

Medical Studies

Advertisements

Management

Government

Sports


Who thought of this stuff

Who thought of this stuff?

  • The Bible: Moses (3000 + years ago)

  • European mathematicians

    • Sir William Petty (1532)

      • First accounts of deaths in London on a weekly basis

    • James Bernoulli (Swiss, 1600’s)

      • Probability of a sequence of events

    • Thomas Bayes (English, 1700’s)

      • Probability concepts


More recently

More Recently….

  • 20th century ROCKS for statistics

    • William Gossett

      • Student’s t-distribution

        • Guinness brewery in Dublin, Ireland

    • W. Edwards Deming (1950’s and 1960’s)

      • Used statistics with Japanese manufacturers


Statistics today

Statistics Today

  • Descriptive or Inferential

  • Descriptive:

    • Summarizing or displaying data so we can quickly obtain an overview

    • Easier, calculator-friendly

  • Inferential:

    • Making claims or drawing conclusions about a population based upon a sample of data from that population.


Descriptive or inferential

Descriptive or Inferential?

  • Comparing the average attention span of GHS students to the average attention span of their dogs

  • Estimating the average attention span of GHS students based upon the attention span of those in Mrs. Brittenham’s class


Some inferential statements

Some Inferential Statements:

  • Based on a recent sample, I am 95 percent certain that the average age of my customers is between 32 and 35 years old.

  • The average salary for male employees in a particular job category across the country was higher than the female employees’ salary, based on a random survey.


Population and sample

Population and Sample

  • Population:

    • All possible measurements or outcomes that are of interest to us in a particular study

      • Examples:

        • All GHS students

        • Citizens of Bowling Green

        • All females in America


Population and sample1

Population and Sample

  • Sample:

    • A portion of the population that is representative of the population from which it is selected

      • Random selection of 50 GHS males

      • Random selection of 200 Bowling Green citizens

      • Random survey of 300 females in America


Your turn

Your turn:

  • Identify each of the following statistics as either descriptive or inferential.

1

73% of Asian American households in the US own a computer.


Your turn1

Your turn:

  • Identify each of the following statistics as either descriptive or inferential.

2

Households with children under the age of 18 are more likely to have access to the Internet (62%) than family households with no children (53%).


Your turn2

Your turn:

  • Identify each of the following statistics as either descriptive or inferential.

3

Hank Aaron hit 755 career home runs.


Your turn3

Your turn:

  • Identify each of the following statistics as either descriptive or inferential.

4

The average SAT score for incoming freshmen at a local college was 950.


Your turn4

Your turn:

  • Identify each of the following statistics as either descriptive or inferential.

5

On a recent poll, 67 percent of Americans had a favorable opinion of the President of the United States.


Your turn5

Your turn:

  • In each of the following, identify the population and the sample.

6

A local politician wants to know the proportion of Warren County residents who support her. She takes a list of registered Democrats and randomly selects 1000 to ask if they support her.


Your turn6

Your turn:

  • In each of the following, identify the population and the sample.

7

Greenwood’s basketball coach wants to know the average height of boys at Greenwood. He randomly selects 50 boys and records their height.


  • Login