Determine whether the statement describes a population or a sample.

1. The annual salaries of all the teachers in a high school.

a) Sample b) Population

Determine if the numerical value describes a parameter or a statistic.

2. A recent poll of 2,056 corporate executives showed that the average price of their cars is $54,500.

a) Sample Statistic b) Population Parameter

Classify the following data as discrete, continuous, or neither.

3) The number of limbs on a 4-year old peach tree is 33.

a) Continuous b) Discrete

Classify the following data as qualitative or quantitative.

4) A marketing group asked the following question to residents of 50 countries: "Rate your experience with American products?"

1) Below Average 2) Average 3) Above Average 4) Good to Excellent

a) Qualitative b) Quantitative

Determine and indicate the level of measurement for the data.

5. The sample of bolts categorized from smallest to biggest.

a) Nominal b) Ratio c) Ordinal d) Interval

Identify which of these types of sampling is used.

6. A sample consists of random 25 students from a group of 496 students

a) Stratified b) Convenience c) Cluster d) Random e) Systematic

Is the study experimental or observational?

7) A political pollster reports that her candidate has a 20% lead in the polls with 24% undecided.

a) Experimental b) Observational

Find the mean for the given sample data.

Answer the question.

9. A self-selected survey is especially prone to ___.

a) Informed Consent

b) Researcher Bias

c) Participation Bias

d) Sampling Error(s)

e) Processing Error(s)

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

10. -4; -9; -12; 2; -5

a) 28.2 b) 28.3 c) 34.8 d) 22.6

Use the empirical rule to solve the problem.

14. At one college, GPA's are normally distributed with a mean of 2.8 and a standard deviation of 0.6. What percentage of students at the college have a GPA between 2.2 and 3.4?

a) 95.44% b) 99.74% c) 68.26% d) 84.13%

Solve the problem.

15. The heights of the adults in one town have a mean of 66.8 inches and a standard deviation of 3.5 inches. What can you conclude from Chebyshev's theorem about the percentage of adults in the town whose heights are between 59.8 and 73.8 inches?

a) The percentage is at least 75% b) The percentage is at most 95%

c) The percentage is at least 95% d) The percentage is at most 75%

Find the standard deviation for the given data. Round your answer to one more decimal place than the original data.

16. 12; 17; 21; 19; 22; 10; 24; 9

a) 5.3 b) 2.2 c) 5.8 d) 1.9

Solve the problem.

17. A state lottery involves the random selection of six different numbers between 1 and 24. If you select one six number combination, what is the probability that it will be the winning.

a) 1/96,909,120 b) 1/191,102,976 c) 1/720 d) 1/134,596

Solve the problem. Round results to the nearest hundredth.

18. The mean of a set of data is 4.59 and its standard deviation is 2.12. Find the z score for a value of 11.29.

a) 3.46 b) 3.48 c) 3.16 d) 2.84

Find the indicated percentile, decile, or quartile.

19. The test scores of 32 students are listed below. Find the 64th percentile.

32; 37; 41; 44; 46; 48; 53; 55; 56; 57; 59; 63; 65; 66; 68; 69; 70; 71; 74; 74; 75; 77; 78; 79; 80; 82; 83; 86; 89; 92; 95; 99

a) 20.48 b) 75 c) 21 d) 74

Find the indicated probability.

20. What is the probability that 5 rolls of a fair die will show exactly two fours?

a) 0.161 b) 0.124 c) 0.0216 d) 0.0324

21. A sample of 100 wood and 100 graphite tennis rackets are taken from the warehouse. If 6 wood and 18 graphite are defective and one racket is randomly selected from the sample, find the probability that the racket is wood or defective.

Answer: _____

Use the given data to construct a frequency table.

22. 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 table for these ages. Use 6 classes beginning with a lower class limit of 27.

Age:

Frequency:

Find the indicated probability.

23. Find the probability of correctly answering the first 3 questions on a multiple choice test if random guesses are made and each question has 4 possible answers.

Answer: _______

Solve the problem

24. Approximately 68% of chemistry students do their homework independently and on time? In a chemistry class of 48 students, what is the probability that 30 students do their homework on time? State your answer to four decimal places.

Answer: _____

State the sample space of possible outcomes for a given problem.

25. Flip a coin four times.

Answer: ______