AP Stats Benchmark Review

• B
• C
• D
• E

• A
• B
• C
• D

• B
• C
• D
• E

• A
• B
• C
• D

• B
• C
• D
• E

The mean of a distribution that is skewed to the left is smaller than the median.

• True

• False

The expected winnings for a particular carnival game is $50 with a standard deviation of $24.  Because few people are playing the game, the owner of this carnival booth decides to double the winnings and reduce the price to play by $2.  What are the new expected winnings and standard deviation?

• E(X) = $100  SD(X) = $48

• E(X) = $98   SD(X) = $46

• E(X) = $102   SD(X) = $48

• E(X) = $100  SD(X) = $46

The mean weight of an adult female beagle is 28 pounds with a standard deviation of 3 pounds.  The mean weight of an adult female boxer is 70 pounds with a standard deviation of 6 pounds.  A beagle named Suzie weighs 34 pounds.  How much would a female boxer have to weigh in order for her to have the same z-score as Suzie?

• 70 pounds

• 76 pounds

• 80 pounds

• 82 pounds

The probability of scoring a 100% on the midterm is 2%.  The probability of scoring a 90% to 99% on the midterm is 3%.  The probability of scoring an 80% to 89% is 10%.  What is the probability that a student will not earn an A or a B on the midterm?

• .00006

• .15

• .85

• .86

Which of the following is most likely skewed to the right?

• Mean = 50 inches  St. Dev. = 5 inches

• Mean = 300 points St. Dev. = 20 points

• Mean = 10 pounds  St. Dev = 4 pounds