Provide an appropriate response.
-The mean length of a human pregnancy is 266 days, with a standard deviation of 9 days. Use the Empirical Rule to determine the percentage of women whose pregnancies are between 257 and 275 days. (Assume the
Data set has a bell-shaped distribution.)
A)68%
B)50%
C)95%
D)99.7%

Question

Quizplus · Accepted Answer

According to the Empirical Rule, approximately 68% of the data in a normal distribution falls within one standard deviation of the mean. Since 257 to 275 days is within one standard deviation (9 days) from the mean (266 days), 68% of pregnancies fall within this range.

Provide an Appropriate Response