Use the following information to answer the question. The mean age of lead actresses from the top ten grossing movies of 2010 was 29.6 years with a standard deviation of 6.35 years. Assume the distribution of the actresses' ages is approximately unimodal and symmetric.
-In 2010, popular actress Jennifer Aniston was 41- years- old. What is Jennifer Aniston's age if it is standardized? Would it be unusual for a 41- year- old actress to be in a top- grossing film of 2010? Assume the Empirical Rule applies and round to the nearest hundredth.
A)z = - 1.80; It would be unusual.
B)z = - 1.80; It would not be unusual.
C)z = 1.80; It would be unusual.
D)z = 1.80; It would not be unusual.

Question

Quizplus · Accepted Answer

Jennifer Aniston's standardized age (z-score) is calculated as (41 - 29.6) / 6.35 = 1.80. According to the Empirical Rule, a z-score of 1.80 is within the range of usual values (within 2 standard deviations from the mean), so it would not be unusual.

Use the Following Information to Answer the Question