2) A medical research team studied the ages of patients who had strokes caused by stress. The ages of 34 patients who suffered stress strokes were as follows.

29, 30, 36, 41, 45, 50, 57, 61, 28, 50, 36, 58, 60, 38, 36, 47, 40, 32, 58, 46, 61, 40, 55, 32, 61, 56, 45, 46, 62, 36, 38, 40, 50, 27

Construct a frequency distribution table for these ages. Use 8 classes beginning with a lower class limit of 25. What is the relative frequency of the 7th class? (Calculate the decimal value first and then round it to 2 decimals)

Find the mean of the set of data.

3) 230, 220, 212, 212, 212, 212, 220, 215, 215, 215, 220, 220

5.About how many students would you expect to prefer TV in a school of 750 students?

Computer 36%

written 9%

TV 12%

Lecture 18%

Film 20%

Radio 5%

6.How many degrees are in the central angle for the "radio" sector?

Computer 36%

written 9%

TV 12%

Lecture 18%

Film 20%

Radio 5%

7. Find the median.

0.88, 1.18, 0.64, 1.62, 0.75, 0.85, 1.18, 1.53, 0.91, 0.88, 1.39, 1.07, 0.47, 1.39, 0.85, 1.07, 1.72, 0.75,1.12, 0.89, 0.56

8. Find the mean for the given frequency distribution.

Find the approximate mean for the grouped frequency distribution. Use the class midpoint to represent each class. (Round your answer to two decimal places)

Score	Frequency
60-69	3
70-79	12
80-89	7
90-99	2

9. Solve the problem.

Jackie's sisters weigh 114 lb, 140 lb, 120 lb, and 129 lb. The average female in her city weighs 139.1 lb. How much does Jackie weigh if she and her sisters have an average weight of 139.1 lb?

10. Find the standard deviation of frequency distribution. (Round to 2 decimals)

Ages (yr)	Frequency
5-10	43
11-16	33
17-22	40
23-28	32
29-34	33

11. Find the standard deviation for the given data. (Round your final answer to one more decimal place than that used for the observations)

The normal monthly precipitation (in inches) for August is listed for 12 different U.S. cities.

3.5, 1.6, 2.4, 3.7, 4.1, 3.9, 1.0, 3.6, 4.2, 3.4, 3.7, 2.2

12. The following scores on the midterm exam in Chemistry 102 were recorded.

93, 81, 59, 69, 82, 74, 61, 77, 95, 84, 88, 71, 86, 97, 63, 72, 89, 80, 60, 98, 91, 62, 78, 83, 76, 81, 94, 66, 83, 96

Find the 3rd quartile.

13. Identify the sampling technique used to obtain a sample.

A game warden chooses to check for fishing licenses in every 5th boat he encounters on his patrol. (Check your spelling! No Exceptions!)

14. A group of people are classified according to height and then random samples of people from each group are taken.(Check your spelling! No Exceptions!)

15) Use the following frequency distribution to determine the midpoint of the first class.

Class	Frequency
12-14	7
15-17	4
18-20	3
21-23	5
24-26	7
27-29	7

15) Use the following frequency distribution to determine the midpoint of the first class.

Class	Frequency
12-14	7
15-17	4
18-20	3
21-23	5
24-26	7
27-29	7

21. Is the study experimental or observational?(Check your spelling! No Exceptions!)

A political pollster reports that his candidate has a 10% lead in the polls with 10% undecided.

23. Find the variance for the given data. (Round your answer to one more decimal place than the original data)

The normal monthly precipitation (in inches) for August is listed for 12 different U.S. cities.

3.5, 1.6, 2.4, 3.7, 4.1, 3.9, 1.0, 3.6, 4.2, 3.4, 3.7, 2.2

24. Find the range for the given data.

Fred, a local mechanic, gathered the following data regarding the price, in dollars, of an oil and filter change at twelve competing service stations:

32.95, 24.95, 26.95, 28.95, 18.95, 28.95, 30.95, 22.95, 24.95, 26.95, 29.95, 28.95

25. The normal monthly precipitation (in inches) for August is listed for 20 different U.S. cities. Find the outlier(s).

0.4, 1.0, 1.5, 1.6, 2.0, 2.2, 2.4, 2.7, 3.4, 3.4, 3.5, 3.6, 3.6, 3.7, 3.7, 3.9, 4.1, 4.2, 4.2, 7.0