Statistics - Ultra SAT Prep

Math Quiz -Statistics and Probability

Covering: mean, median, mode, range, standard deviation, data interpretation through graphs and charts, and basic probability, including compound events and independent events.

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1. Eight friends each scored a different number of points in a game. Their scores were 15, 18, 20, 22, 25, 28, 30, and 34. What is the mean score?

a) 22

b) 24

c) 26

d) 28

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2. In a class of 12 students, the average test score is 75. If one student has an unusually high score of 100, what is the average of the other 11 students' test scores?

a) 70

b) 71

c) 72.7

d) 73

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3. The annual incomes of five people are $45,000, $60,000, $65,000, $50,000, and $70,000. What is the range of their incomes?

a) $25,000

b) $20,000

c) $15,000

d) $10,000

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4. The weight of apples in a grocery store is normally distributed, with a mean weight of 150 grams and a standard deviation of 10 grams. What is the approximate weight of an apple that is one standard deviation above the mean?

a) 140

b) 150

c) 160

d) 170

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5. What is the probability of getting at least one head when flipping two fair coins?

a) 3/4

b) 1/2

c) 1/4

d) 2/3

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