1. (TCO 1) What method of data collection would you use to collect data for a study of the salaries of college professors at a particular college?
2. (TCO 2) There is a relationship between smoking cigarettes and getting emphysema. This statement describes
3. (TCO 2) The colors of automobiles on a used car lot are
4. (TCO 1) A lobbyist for a major airspace firm assigns a number to each legislator and then uses a computer to randomly generate ten numbers. The lobbyist contacts the legislators corresponding to these numbers. What sampling technique is used?
5. (TCO 2) The average salary of all General Motors workers is $42,500. This number is a
6. (TCO 2) Subjects in a sample, when properly selected, should possess
7. (TCO 2) Suppose the standard deviation is 13.1. What is the variance?
8. (TCO 10) This data shows the temperatures on randomly chosen days during a summer class and the number of absences on those days. (temperature, number of absences) (72, 3), (85, 7), (91, 10), (90, 10), (88, 8), (98, 15), (75, 4), (100, 16), (80, 5)
Find the equation of the regression line for the given data.
9. (TCO 9) A researcher found a significant relationship between a person’s age, a, the number of hours a person works per week, b, and the number of accidents, y, the person has each year. The relationship can be represented by the multiple regression equation y = 3.2 + 0.012a + 0.23b. Predict the number of accidents per year (to the nearest whole number) for a person whose age is 45 and who works 42 hours per week
10. (TCO 9) Interpret an r value of 0.82
1. (TCO 3) Use this table to answer the questions.
Height (in inches)

Frequency

5052

5

5355

8

5658

12

5961

13

6264

11

1. Identify the class width.
2. Identify the midpoint of the first class.
3. Identify the class boundaries of the first class.
4. Give the relative frequency for each class.
2. (TCO 3) The heights in inches of 18 randomly selected adult males in LA are listed as: 70, 69, 72, 57, 70, 66, 69, 73, 80, 68, 71, 68, 72, 67, 58, 74, 81, 72.
1. Display the data in a stemandleaf plot.
2. Find the mean.3. Find the median.
4. Find the mode.
5. Find the range.
6. Find the variance.
7. Find the standard deviation