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Fall Final Review – AP Stats
Name: ______________________________
Date: ____
1. A researcher notices that in a sample of adults, those that take larger amounts of vitamin C have fewer
illnesses. However, those that take larger amounts of vitamin C also tend to exercise more. As explanations
for having fewer illnesses, the variables “amount of vitamin C taken” and “amount of exercise” are
A) skewed.
B) confounded.
C) common responses.
D) symmetric.
2. Event A occurs with probability 0.3. If event A and B are disjoint then
A) P(B)
≤
0.3.
B) P(B)
≥
0.3.
C) P(B)
≤
0.7.
D) P(B)
≥
0.7.
3. Birthweights at a local hospital have a normal distribution with a mean of 110 ounces and a standard
deviation of 15 ounces. The proportion of infants with birthweights between 125 ounces and 140 ounces is
4. The Insurance Institute for Highway Safety publishes data on the total damage suffered by compact
automobiles in a series of controlled, lowspeed collisions. A sample of the data in dollars, with brand names
removed, is
1000
600
800
1000
The variance of the above data is
5. Which of the following is likely to have a mean that is smaller than the median?
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 '09
 Normal Distribution, Standard Deviation, Simple random sample, leastsquares regression line, B C D B B C

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