Question 1

Find the probability of the event.
-If two 6-sided dice are rolled, what is the probability that the sum is 4?

Accepted Answer

A)  3 
B)  23 
C)  121 
D)  1112

Question 2

Identify whether the number described is a parameter or a statistic.
-A survey of 220 employees of a certain company revealed that 24% of those surveyed were dissatisfied with their jobs.

Accepted Answer

A)  Parameter 
B)  Statistic

Question 3

Determine the five-number summary of the given data.
-The National Education Association collects data on the number of years of teaching experience of high-school teachers. A sample taken this year of 19 high-school teachers yielded the following data on number of years of
Teaching experience.

Accepted Answer

A)  1, 5, 18.5, 26, 33 
B)  1, 4.50, 19, 25.25, 33 
C)  1, 5, 19, 26, 33 
D)  1, 4.50, 18.5, 25.25, 33

Question 4

Determine the five-number summary of the given data.
-5, 12, 15, 17, 20, 30, 15, 40, 12, 17, 20, 20, 12

Accepted Answer

A)  5, 17, 15, 17, 12 
B)  12, 13.5, 17, 20, 40 
C)  5, 12, 16, 20, 30 
D)  5, 12, 17, 20, 40

Question 5

Find the median for the given sample data.
-2, 3, 8, 21, 30, 30, 49 Find the median for the data.

Accepted Answer

A)  21 
B)  8 
C)  30 
D)  25.5

Question 6

Find the probability.
-The maker of a certain candy claims that the proportions of colors of candy produced are: 0.1 red, 0.1 blue, 0.1 green, 0.1 purple and 0.6 yellow. Suppose a candy is selected randomly from each of two newly-opened
Bags. What is the probability that one is green and the other is blue?

Accepted Answer

A)  0.99 
B)  0.01 
C)  0 
D)  0.2

Question 7

Find the probability.
-The maker of a certain candy claims that the proportions of colors of candy produced are: 0.2 red, 0.4 blue, 0.2 green, 0.1 purple and 0.1 yellow. What is the probability that a randomly selected candy from a newly-opened
Bag will be blue or red?

Accepted Answer

A)  0.2 
B)  1 
C)  0.6 
D)  0.4

Question 8

Solve the problem.
-A medium-sized company characterized their employees based on the sex of the employee and their length of service to the company. The results are summarized in the table below.

What percentage of the men have worked for the company for more than 10 years?

Accepted Answer

A)  57.7% 
B)  15.4% 
C)  66.7% 
D)  30.8%

Question 9

Find the z-score(s) bounding the region in a Normal distribution.
-The 30th percentile

Accepted Answer

A)  -0.53 
B)  -0.47 
C)  -0.12 
D)  -0.98

Question 10

Find the mean for the given sample data.
-Six college students spent $150.79, $189.07, $294.93, $206.37, $297.05, and $292.43 respectively for books. Compute the mean amount spent. Round your answer to the nearest cent.

Accepted Answer

A)  $274.13 
B)  $286.13 
C)  $238.44 
D)  $357.66

Question 11

Solve the problem.
-The length of time it takes college students to find a parking spot in the library parking lot follows a normal distribution with a mean of 4.5 minutes and a standard deviation of 1 minute. Find the probability that a
Randomly selected college student will find a parking spot in the library parking lot in less than 4.0 minutes.

Accepted Answer

A)  0.2674 
B)  0.3551 
C)  0.1915 
D)  0.3085

Question 12

Solve the problem.
-The total distances (in miles) cycled by sixteen athletes in the week prior to a cycling race are shown below. Find the interquartile range.
787 644 820 676
475 603 525 663
568 693 875 501
590 460 562 490

Accepted Answer

A)  415 mi 
B)  171.5 mi 
C)  175 mi 
D)  181.75 mi

Question 13

Solve the problem.
-A sample of 350 students was selected and each was asked the make of their automobile (foreign or domestic) and their year in college (freshman, sophomore, junior, or senior). The results are shown in the table below.

What percent of seniors drive a domestic automobile?

Accepted Answer

A)  71.4% 
B)  28.6% 
C)  7.3% 
D)  4.3%

Question 14

Identify the following as an experiment or an observational study.
-A researcher would like to survey a random sample of a town's 1260 eligible voters. He obtains a list of the
eligible voters, numbers the voters alphabetically, and uses the calculator command "randInt(1, 1260, 100)" to
select 100 numbers to correspond to the voters selected.

Accepted Answer

The answer of Identify the following as an experiment or...

Question 15

Find the normal probability using a grapher.
-P(z > -1.25)

Accepted Answer

A)  0.584 
B)  0.719 
C)  0.698 
D)  0.894

Question 16

Solve the problem.
-Suppose you receive a shipment of 16 calculators, two of which are defective. What is the probability of picking a sample of 5 calculators with exactly one bad calculator in it? (Round approximations to the nearest
Thousandth.)

Accepted Answer

A)  0.458 
B)  0.092 
C)  0.046 
D)  0.229

Question 17

Eleven dimes dated 1989 through 1999 are tossed. Find the probability of the event.
-Exactly 2 heads

Accepted Answer

A)  10922048 
B)  204855 
C)  12 
D)  20481

Question 18

Determine the five-number summary of the given data.
-50, 52, 61, 61, 61, 61, 63, 63, 66, 67, 67, 69, 71, 72, 73, 75, 78, 80, 82, 83, 88, 88

Accepted Answer

A)  50, 61, 68, 78, 88 
B)  49, 61, 69, 78, 89 
C)  52, 61, 68, 78, 88 
D)  50, 61, 67, 78, 88

Question 19

Find the z-score(s) bounding the region in a Normal distribution.
-The middle 96%

Accepted Answer

A)  -2.05 and 2.05 
B)  -1.75 and 1.75 
C)  -2.33 and 2.33 
D)  0 and 2.05

Question 20

Determine the five-number summary of the given data.
-The normal annual precipitation (in inches) is given below for 21 different U.S. cities.

Accepted Answer

A)  5.1, 13.675, 21.45, 29.900, 51.7 
B)  5.1, 14.25, 21.45, 31.15, 51.7 
C)  5.1, 14.25, 22.0, 31.15, 51.7 
D)  5.1, 13.675, 22.0, 29.900, 51.7

Exam 10: Statistics and Probability

Find the probability of the event. -If two 6-sided dice are rolled, what is the probability that the sum is 4?

Identify whether the number described is a parameter or a statistic. -A survey of 220 employees of a certain company revealed that 24% of those surveyed were dissatisfied with their jobs.

Determine the five-number summary of the given data. -The National Education Association collects data on the number of years of teaching experience of high-school teachers. A sample taken this year of 19 high-school teachers yielded the following data on number of years of Teaching experience.

Determine the five-number summary of the given data. -5, 12, 15, 17, 20, 30, 15, 40, 12, 17, 20, 20, 12

Find the median for the given sample data. -2, 3, 8, 21, 30, 30, 49 Find the median for the data.

Find the probability. -The maker of a certain candy claims that the proportions of colors of candy produced are: 0.2 red, 0.4 blue, 0.2 green, 0.1 purple and 0.1 yellow. What is the probability that a randomly selected candy from a newly-opened Bag will be blue or red?

Solve the problem. -A medium-sized company characterized their employees based on the sex of the employee and their length of service to the company. The results are summarized in the table below. What percentage of the men have worked for the company for more than 10 years?

Find the z-score(s) bounding the region in a Normal distribution. -The 30th percentile

Find the mean for the given sample data. -Six college students spent $150.79, $189.07, $294.93, $206.37, $297.05, and $292.43 respectively for books. Compute the mean amount spent. Round your answer to the nearest cent.

Solve the problem. -The total distances (in miles) cycled by sixteen athletes in the week prior to a cycling race are shown below. Find the interquartile range. 787 644 820 676 475 603 525 663 568 693 875 501 590 460 562 490

Solve the problem. -A sample of 350 students was selected and each was asked the make of their automobile (foreign or domestic) and their year in college (freshman, sophomore, junior, or senior) . The results are shown in the table below. What percent of seniors drive a domestic automobile?

Find the normal probability using a grapher. -P(z > -1.25)

Solve the problem. -Suppose you receive a shipment of 16 calculators, two of which are defective. What is the probability of picking a sample of 5 calculators with exactly one bad calculator in it? (Round approximations to the nearest Thousandth.)

Eleven dimes dated 1989 through 1999 are tossed. Find the probability of the event. -Exactly 2 heads

Determine the five-number summary of the given data. -50, 52, 61, 61, 61, 61, 63, 63, 66, 67, 67, 69, 71, 72, 73, 75, 78, 80, 82, 83, 88, 88

Find the z-score(s) bounding the region in a Normal distribution. -The middle 96%

Determine the five-number summary of the given data. -The normal annual precipitation (in inches) is given below for 21 different U.S. cities.