1 / 13

Chapter 1

Intro to Statistics. Chapter 1. What is statistics…. The science of data. Individuals:. The objects described by a set of data. Examples: People Animals Things. Variables:. Any characteristics of an individual. Categorical variable:

merle
Télécharger la présentation

Chapter 1

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. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Intro to Statistics Chapter 1

  2. What is statistics…. • The science of data.

  3. Individuals: • The objects described by a set of data. • Examples: • People • Animals • Things

  4. Variables: • Any characteristics of an individual. • Categorical variable: • Places an individual into one of several groups or categories. • Quantitative variable: • Takes numerical values for which arithmetic operations such as adding and averaging make sense.

  5. Example 1.1: Fuel-efficient cars • Here is a small part of a data set that describes the fuel economy (in miles per gallon) of 1998 model motor vehicles: • What are the individuals in this data set? • For each individual, what variables are given? • Which of these variables are categorical and which are quantitative?

  6. Distribution: • The pattern of variation of the variable.

  7. Displaying Categorical Variables: • The distribution of a categorical variable lists the categories and gives either a count or percent of the individuals who fall in each category. 1. Bar graph 2. Pie chart

  8. Ex 1. Bar Graph… • What is your favorite way of communicating with friends?

  9. Ex 2. Pie Chart… • What is your gender?

  10. Displaying Quantitative Variables: 1. Dotplot 2. Stemplot 3. Histogram 4. Boxplot

  11. Ex 1. Dotplot… • What is your height in inches?

  12. Ex 2. Stemplots… • What is the fastest speed you have ever driven? • Create a stemplot that is not gender specific. • Create a back-to-back stemplot based on gender.

  13. Ex 3. Histogram… • How old is Mr. Padavil?

More Related