Stat 160 Prequiz over Section 2.5 and 2.6



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1. The probability that a basketball player makes a freethrow is .75. If the player shoots 2 independent times, what is the probability of making both shots (that is, he makes shot1 and he makes shot 2)?

0.4375
Impossible to compute.
0.5625
0.75
2. Same situation as problem 1. What is the probability of missing 2 out of 2 shots?

.140625
1
.0625
.421875
3. Let A and B be dependent events. If the probability of A is .2 and the probability of B is .8, then the probability that both A and B occur is

.16
1.0
.4
Not enough information.
4. Independent events often occur when

Sampling without replacment.
Never.
Only on July 4.
Sampling with replacment.