MATH 120: Introduction to Statistics latest Week 8
Final Exam. MAY QTR with 100% Accurate Answers.
GRADED+(LATEST 2024/2025)
1. 10 students take an exam and earn the following scores: 86, 96, 90, 92, 79, 94, 86, 74, 82, and 91
What is the mean of the scores?
A: 87.
2. 10 students take an exam and earn the following scores: 86, 96, 90, 92, 79, 94, 86, 74, 82, and 91
What is the median of the scores?
A: 88.
3. 10 students take an exam and earn the following scores: 86, 96, 90, 92, 79, 94, 86, 74, 82, and 91
What is the mode of the scores?
A: 86.
4. While conducting market research, an automobile manufacturer looks at the number of SUVs
and sedans produced in the prior year. What type of data is this?
A: Quantitative data.
5. While conducting market research, an automobile manufacturer asks consumers about their
preferences between SUVs and sedans. What type of data is this?
A: Qualitative data.
6. A political think tank wants to conduct a poll of likely voters in a state. If the think tank breaks
the state into 20 groups with common characteristics and then randomly samples each group,
what type of sampling is this?
A: Stratified sampling.
7. A research team at a medical device manufacturer wants FDA approval for the manufacturer's
latest product. The team sets up a study where half of the participants in the study use the
device and half of the participants in the study do not. When the study is over, the research
team compares the results of the two groups. Which type of study is this?
A: Experimental study.
8. If 10,000 students take a standardized test, which type of graph would be most helpful for
understanding the data?
A: A histogram..
,9. If the graph is displaying the estimated value of homes in an area, approximately what is the
average home value?
A: $375K.
10. Which answer explains why the average home value is above the median home value?
A: A few outlier home values are skewing the average high.
11. If there is a 30% chance of rain each of the next two days, what is the probability of rain both
days? (Assume rain is an independent event.)
A: 9%
12. If there is a 60% chance of rain each of the next two days, what is the probability that it does not
rain on either day? (Assume rain is an independent event.)
A: 16%
13. Roulette is a game of chance using a wheel with 38 colored pockets and a ball that randomly
lands in one of the colored pockets. In the American version of roulette, there are 18 red
pockets, 18 black pockets, and 2 green pockets. What is the probability that a gambler betting on
green will win?
A: 16
, 14. If a deck of cards contains 52 cards, divided into 13 clubs, 13 diamonds, 13 hearts, and 13
spades, what is the probability of drawing a spade from the deck?
A: 25%
15. If a deck of cards contains 52 cards, divided into 13 clubs, 13 diamonds, 13 hearts, and 13
spades, what is the probability of drawing two spades in a row from the deck? (Note, cards are
not replaced between draws.)
A: 5.9%
16. If a charity raises money from thirty donors, and sixteen of the donors each give \$20, twelve of
the donors each give \$50, and two of the donors each give \$100, what is the weighted average
donation?
A: $37
17. If a venture capitalist is considering an investment and she believes there is a 20% chance the
investment loses \$1M, a 70% chance the investment makes \$1M, and a 10% chance the
investment makes \$10M, what is the expected value of the investment?
A: $1.5M
18. What is the factorial of 4?
A: 24
19. If a bank assigns 8-digit account numbers to all of its customers, how many possible account
numbers are there? (Note that digits can be range from 0 to 9.)
A: 100,000,000
20. If a bank assigns 8-digit account numbers to all of its customers, but decides that account
numbers cannot contain the number 0 or start with the number 1, how many possible account
numbers are there?
A: 38,263,752
21. The area under a normal distribution is equal to:
A: 1.00
22. In a normal distribution, what is the relationship between the mean and the median?
A: They are the same.
23. If 1 million people take a standardized test and Sarah scores two standard deviations above the
mean, what percentile is she?
A: 97%
Final Exam. MAY QTR with 100% Accurate Answers.
GRADED+(LATEST 2024/2025)
1. 10 students take an exam and earn the following scores: 86, 96, 90, 92, 79, 94, 86, 74, 82, and 91
What is the mean of the scores?
A: 87.
2. 10 students take an exam and earn the following scores: 86, 96, 90, 92, 79, 94, 86, 74, 82, and 91
What is the median of the scores?
A: 88.
3. 10 students take an exam and earn the following scores: 86, 96, 90, 92, 79, 94, 86, 74, 82, and 91
What is the mode of the scores?
A: 86.
4. While conducting market research, an automobile manufacturer looks at the number of SUVs
and sedans produced in the prior year. What type of data is this?
A: Quantitative data.
5. While conducting market research, an automobile manufacturer asks consumers about their
preferences between SUVs and sedans. What type of data is this?
A: Qualitative data.
6. A political think tank wants to conduct a poll of likely voters in a state. If the think tank breaks
the state into 20 groups with common characteristics and then randomly samples each group,
what type of sampling is this?
A: Stratified sampling.
7. A research team at a medical device manufacturer wants FDA approval for the manufacturer's
latest product. The team sets up a study where half of the participants in the study use the
device and half of the participants in the study do not. When the study is over, the research
team compares the results of the two groups. Which type of study is this?
A: Experimental study.
8. If 10,000 students take a standardized test, which type of graph would be most helpful for
understanding the data?
A: A histogram..
,9. If the graph is displaying the estimated value of homes in an area, approximately what is the
average home value?
A: $375K.
10. Which answer explains why the average home value is above the median home value?
A: A few outlier home values are skewing the average high.
11. If there is a 30% chance of rain each of the next two days, what is the probability of rain both
days? (Assume rain is an independent event.)
A: 9%
12. If there is a 60% chance of rain each of the next two days, what is the probability that it does not
rain on either day? (Assume rain is an independent event.)
A: 16%
13. Roulette is a game of chance using a wheel with 38 colored pockets and a ball that randomly
lands in one of the colored pockets. In the American version of roulette, there are 18 red
pockets, 18 black pockets, and 2 green pockets. What is the probability that a gambler betting on
green will win?
A: 16
, 14. If a deck of cards contains 52 cards, divided into 13 clubs, 13 diamonds, 13 hearts, and 13
spades, what is the probability of drawing a spade from the deck?
A: 25%
15. If a deck of cards contains 52 cards, divided into 13 clubs, 13 diamonds, 13 hearts, and 13
spades, what is the probability of drawing two spades in a row from the deck? (Note, cards are
not replaced between draws.)
A: 5.9%
16. If a charity raises money from thirty donors, and sixteen of the donors each give \$20, twelve of
the donors each give \$50, and two of the donors each give \$100, what is the weighted average
donation?
A: $37
17. If a venture capitalist is considering an investment and she believes there is a 20% chance the
investment loses \$1M, a 70% chance the investment makes \$1M, and a 10% chance the
investment makes \$10M, what is the expected value of the investment?
A: $1.5M
18. What is the factorial of 4?
A: 24
19. If a bank assigns 8-digit account numbers to all of its customers, how many possible account
numbers are there? (Note that digits can be range from 0 to 9.)
A: 100,000,000
20. If a bank assigns 8-digit account numbers to all of its customers, but decides that account
numbers cannot contain the number 0 or start with the number 1, how many possible account
numbers are there?
A: 38,263,752
21. The area under a normal distribution is equal to:
A: 1.00
22. In a normal distribution, what is the relationship between the mean and the median?
A: They are the same.
23. If 1 million people take a standardized test and Sarah scores two standard deviations above the
mean, what percentile is she?
A: 97%
