Determine whether the given value is a statistic or a parameter.

1. A researcher examines the records of all the registered voters in one city and finds that 61% are registered Republicans.

A) Parameter

B) Statistic

C) Population

D) Variable

Find the indicated percentile.

2). The weights (in pounds) of 30 newborn babies are listed below. Find 46th percentile.

5.5 5.7 5.8 5.9 6.1 6.1 6.4 6.4 6.5 6.6

6.7 6.7 6.7 6.9 7.0 7.0 7.0. 7.1 7.2 7.2

7.4 7.5 7.7 7.7 7.8 8.0 8.1 8.1. 8.3 8.7

A) 13.8

B) 6.9

C) 6.4

D) 6.6

Find the median for the given sample data.

3). 1.6 2.6 3.0 1.1 1.3 3.7 1.9 3.5 2.3 2.8 1.9

A) 2.40

B) 2.30

C) 2.3

D) 1.9

Calculate sample variance.

4). Calculate sample variance of SAT test results with following scores: 1240, 1462, 982, 790, 1148, 1296. Round your answer to the nearest integer.

A) 56907

B) 239

C) 47422

D) 218

Find the standard deviation.

5). Find standard deviation for sample of test scores from a Biology class with following data: 78, 64, 82, 91, 68, 71, 86, 60. State your answer to one decimal places.

A) 105.8

B) 11.0

C) 10.3

D) 120.9

Find z-score.

6). Scores a history test have average of 80 with standard deviation of 6. What is the z-score for a student who earned a 75 on the test? State your. answer to two decimal place.

A) -1.83

B) 1.83

C) 0.83

D) -0.83

Find the area under the standard normal curve.

7). Find the area under the standard normal curve to the right of z=0.94. State your answer to four decimal places.

A) -0.1736

B) 0.1736

C) -0.8264

D) 0.8264

Find the indicated probability.

8). If you pick a card at random from a well shuffled deck, what is the probability that you get a hearts or a 5?

A) 17/52

B) 9/26

C) 4/13

D) 11/26

9) The table below describes the smoking habits of a group of asthma sufferers.

	Nonsmoker	Occasional smoker	Regular smoker	Heavy smoker	Total
Men	328	45	64	33	470
Women	401	35	61	34	531
Total	729	80	125	67	1001

If one of the 1001 people is randomly selected, find the probability that the person is a man or a heavy smoker.

A) 0.471

B) 0.536

C) 0.503

D) 0.493

10). A manufacturing process has a 70% yield, meaning that 70% of the products are acceptable and 30% are defective. If three of the products are randomly selected, find the probability that all of them are acceptable.

A) 0.429

B) 0.343

C) 2.1

D) 0.027

Determine whether the given procedure results in a binomial distribution. If not, state the reason, why.

11). Rolling a single die 63 times, keeping track of the "fives" rolled.

A) Not binomial: there are too many trials.

B) Not binomial: there are more than two outcomes for each trial.

C) Procedure results in a binomial distribution.

D) Not binomial: the trials are not independent.

Find the indicated probability.

12). An IRS auditor randomly selects 3 tax returns from 42 returns of which 14 contain errors. What is the probability that she selects none of those containing errors?

A) 0.2854

B) 0.2963

C) 0.0317

D) 0.037

13). What is the probability that 6 rolls of a fair die will show exactly two fours?

A) 0.0294

B) 0.0331

C) 0.0186

D) 0.0335