The Average Diameter of Sand Dollars on a Certain Island

question 66

Multiple Choice

The average diameter of sand dollars on a certain island is 4.00 centimeters with a standard deviation of 0.80 centimeters. If 25 sand dollars are chosen at random for a collection, find the probability that
The average diameter of those sand dollars is more than 3.824 centimeters. Assume that the variable is
Normally distributed.

• A) 0.8414
• B) 0.8483
• C) 0.8643
• D) 0.8611

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