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MATH 120: INTRODUCTION TO
STATISTICS LATEST WEEK 8
FINAL EXAM. MAY QTR WITH
100% ACCURATE ANSWER S.
GRADED+
Question 1: A 6-sided die is rolled 2 times. What is the
probability of getting 1 both times?
Correct answer: 1/36
Question 2: Assume that 1,500,000 people take the ACT
each year and their scores form a normal distribution. If Susan scores one standard deviation below the mean, what percentile is she?
Correct answer: 16th
Question 3: Assume that 1,500,000 people take the SAT
each year and their scores form a normal distribution. If Mike scores two standard deviations above the mean, what percentile is he?
Correct answer: 98th
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Question 4: Assume that 20 people take a math test,
which is not enough for a normal distribution to form. If Ian scores at the mean, can we determine what percentile he is? (Answer yes or no.)
Correct answer: No
Question 5: Assume that 20 people take a math test,
which is not enough for a normal distribution to form. If Josie scores one standard deviation above the mean, can we determine what percentile she is? (Answer yes or no.)
Correct answer: No
Question 6: Assume that 20 people take a math test,
which is not enough for a normal distribution to form. If Tim scores at the median, can we determine what percentile he is? (Answer yes or no.)
Correct answer: Yes
Question 7: A band has 10 musicians. How many possible
groups of 3 musicians can it form?
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Correct answer: 120
Question 8: A basketball team has 5 guards and 4
forwards. How many different ways can the coach select
- guards and 2 forwards?
Correct answer: 60
Question 9: Breaking a population into distinct groups
that share common characteristics and then randomly sampling within those groups is described as
Correct answer: Stratified sampling
Question 10: Compare the scores of the two gymnastics
teams. Which team exhibits more variance in performance? Team A (192, 195, 198) Team B (195,196, 197)
Correct answer: Team A
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Question 11: Compare the scores of the two gymnastics
teams. Which team is more likely to win on any given day? Team A (192, 195, 198) Team B (195,196, 197)
Correct answer: Team B
Question 12: Daniel is having friends over for dinner. If 4
people will be eating dinner, how many potential seating arrangements are there?
Correct answer: 24
Question 13: A dartboard has 20 wedges (numbered 1 to
20) and a bullseye. If a player randomly throws a dart at the board, what is the probability that the dart hits an even number?
Correct answer: 50%
Question 14: A dartboard has 20 wedges (numbered 1 to
20) and a bullseye. If a player randomly throws a dart at the board, what is the probability that the dart hits a number less than 10?