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.
-Between what two values would you expect to find about 95% of the lead actresses ages?
A)10.55 and 48.65 years
B)23.25 and 35.95 years
C)16.9 and 42.3 years
D)None of these

Question

Quizplus · Accepted Answer

Using the empirical rule (68-95-99.7 rule), about 95% of data falls within two standard deviations from the mean. Thus, the range is 29.6 ± (2 * 6.35), which is 16.9 to 42.3 years.

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