# Math 113 - Technology Project 4

Inferences When Variables are Related

## Group Members

1. __________________________

2. __________________________

3. __________________________

## Project

Follow the Minitab instructions under the technology
exercises link on the website for information about how to do the problems.

- Use the color frequency data from Activity 8 to test the claim that M&M
Peanut candies are distributed as claimed by M&M Mars.
- Conduct the hypothesis test by hand (Minitab doesn't directly do a goodness
of fit test) and create a table in your project with the appropriate values.
- Find the p-value for the test statistic.
- Create a similar to the graph on technology
project 3 demonstrating
the hypothesis test. In addition, include a vertical line at the
test statistic
and label the
graph with the p-value.
- Give the decision and conclusion for the test.

- Test the claim that there is a correlation in Illinois between the
rate of front seat driver and passenger seatbelt usage and the
total fatality rate.
- Before collecting the data and analyzing it, discuss the kind
of relationship you think might exist between the two variables.
The seatbelt
usage rate
is the percent of people in the front seat wearing their seatbelts
and the fatality
rate is the number of deaths per million of vehicle miles traveled.
- Gather the data and make a fitted line plot.
- Test for linear correlation. Check the residuals for normality.
- Give a regression model that will estimate the fatality rate
based on the seatbelt usage rate.
- There was one point that appeared to be influential
because of the low seatbelt usage. Remove this
point and re-run the
analysis. Which
model is a better fit?