The Average Diameter of Sand Dollars on a Certain Island

question 13

Multiple Choice

The average diameter of sand dollars on a certain island is 3.00 centimeters with a standard deviation of 1.00 centimeters. If 9 sand dollars are chosen at random for a
Collection, find the probability that the average diameter of those sand dollars is more
Than 2.60 centimeters. Assume that the variable is normally distributed.

• A) 0.885
• B) 0.385
• C) 0.615
• D) 0.820

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Male Domination

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