Topic Test

Question 1

best

Revolt · Accepted Answer

nonrandom and biased

Question 2

Which best describes the complement of spinning any number less than 3?

Revolt · Accepted Answer

spinning a 3 or 4

Question 3

There were 8 finalists in the Atlantic County spelling bee and 12 finalists in the Ocean County spelling bee. If one finalist from each county will advance to the state finals, how many different combinations are possible?

Revolt · Accepted Answer

96

Question 4

A drawer of loose socks contains 2 red socks, 2 green socks, and 6 white socks. Which best describes how to determine the probability of pulling out a white sock, not replacing it, and pulling out another white sock?

Revolt · Accepted Answer

The probability that the first sock is white is and that the second sock is white is , so the probability of choosing a pair of white socks is .

Question 5

When Jim surveyed 5 sixth-grade students at the community skating rink, he found that only 1 out of the 5 had completed the science project. He knows there are about 160 sixth-grade students in his community, so he infers that around 32 students have finished their science project. Is this a good inference?

Revolt · Accepted Answer

No, Jim did not make a good inference because his sample is too small and may be biased because he only asked students that were at the rink.

Topic Test Answers

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