# Intro to statistics

User Generated

Ovatb77

Mathematics

Umass

## Description

Homework Assignment 3 (uses “reasons to buy” data and “cars-triola” data

• Using Reason to buy data, find the clustered bar chart and perform a chi square test of independence on the two variables, student group and reasons to buy.
• Use the appropriate T-tests for the following:
• To see if the average city mileage is significantly different than 20 mpg.
• Is the average highway mileage significantly higher than the average city mileage for this sample?
• Is there a significant difference in the average city mileage comparing manual versus auto transmission vehicles?
• Is there any significant difference in the average city mileage comparing 4, 6 and 8 cylinder vehicles?
• And also do a post hoc comparison test.
• Do an error bar graph.

### Unformatted Attachment Preview

Homework Assignment 3 (uses “reasons to buy” data and “cars-triola” data 1. Using Reason to buy data, find the clustered bar chart and perform a chi square test of independence on the two variables, student group and reasons to buy. 2. Use the appropriate T-tests for the following: a. To see if the average city mileage is significantly different than 20 mpg. b. Is the average highway mileage significantly higher than the average city mileage for this sample? c. Is there a significant difference in the average city mileage comparing manual versus auto transmission vehicles? 3. a. Is there any significant difference in the average city mileage comparing 4, 6 and 8 cylinder vehicles? b. And also do a post hoc comparison test. c. Do an error bar graph.
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## Explanation & Answer

Homework Assignment 3 (uses “reasons to buy” data and “cars-triola” data
1. Using Reason to buy data, find the clustered bar chart and perform a chi square test of
independence on the two variables, student group and reasons to buy....

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