Math 113 - Technology Project 7
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 Internet delay data that you collected from technology project
6 to test for differences in the delay times. If you determine that
there are differences, identify where the differences lie.
- Test the claim that there is no difference in the delay times of the
different sites.
- Test the claim that there is no difference in the delay times of
the different samples.
- Use the 2001 Hate Crime Data to see if there is the race (black,
white) of the offender is related to the first offense (aggravated
assault, simple
assault, intimidation, destruction / vandalism).
- Use the color frequency data from Activity 6 to test the claim
that M&M
Peanut candies are distributed as claimed by M&M Mars. Be sure
to find the p-value.
- 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?