1. The commute times (in minutes) of 30 executives are listed below. Construct a frequency distribution in the table below then draw the corresponding frequency histogram for the data using a class width of 2. Be sure to label your graph clearly. 70 72 71 70 69 73 69 68 70 71 67 71 70 74 69 68 71 71 71 72 69 71 68 67 73 74 70 71 69 68

Class	Frequency

2. A student scores 56 on a geography test and 285 on a mathematics test. The geography test has a mean of 80 and a standard deviation of 20. The mathematics test has a mean of 300 and a standard deviation of 10. If the data for both tests are normally distributed, on which test did the student score better relative to the other students in each class? Hint: Look at the z-score for each test. (a) Find the equation of the least-squares regression line. Round to the nearest hundredth.

Use the data in the following table:

3 5 2 8 2 4 4 5 6 3 65 80 60 88 66 78 85 90 90 71 Line: (b) Predict the value of when =7.