# Question: For the U S Statewide Crime data file on the text

For the U.S. Statewide Crime data file on the text CD, using MINITAB to analyze y = violent crime rate and x = urbanization (percentage of the residents living in metropolitan areas) gives the results shown:

The regression equation is violent = 36.0 + 5.93 urban

a. Using the five-number summary of positions, sketch a box plot for y . What does your graph and the reported mean and standard deviation of y tell you about the shape of the distribution of violent crime rate?

b. Construct a scatter plot. Does it show any potentially influential observations? Would you predict that the slope would be larger, or smaller, if you delete that observation? Why?

c. Fit the regression without the observation highlighted in part b. Describe the effect on the slope.

The regression equation is violent = 36.0 + 5.93 urban

a. Using the five-number summary of positions, sketch a box plot for y . What does your graph and the reported mean and standard deviation of y tell you about the shape of the distribution of violent crime rate?

b. Construct a scatter plot. Does it show any potentially influential observations? Would you predict that the slope would be larger, or smaller, if you delete that observation? Why?

c. Fit the regression without the observation highlighted in part b. Describe the effect on the slope.

**View Solution:**## Answer to relevant Questions

Access the HS Graduation Rates file on the text CD, which contains statewide data on x = high school graduation rate and y = percentage of individuals without health insurance. a. Construct a scatter plot. Describe the ...An Associated Press story (February 15, 2002) quoted a study at the University of California at San Diego that reported, based on a nationwide survey, that those who averaged at least 8 hours sleep a night were 12% more ...a. Find the approximate margin of error when n = 1. b. Show the two possible percentage outcomes you can get with a single observation. Explain why the result in part a means that with only a single observation, you have ...Use the Random Numbers applet on the text CD or use software to (a) answer the previous exercise and (b) select a simple random sample of three students out of a class of 500 students. More than 75% of Americans answer yes when asked, “Do you favor cracking down against illegal gun sales?” but more than 75% say no when asked, “Would you favor a law giving police the power to decide who may own a ...Post your question