A Statistician Believes That the Standard Deviation of the Weights $a = 0.05$

question 84

Multiple Choice

A statistician believes that the standard deviation of the weights of firemen is less than 25 pounds. A sample of 20 firemen had a standard deviation of 23.2 pounds. Assume that the variable is normally
Distributed with $a = 0.05$ . What is the critical value?

• A) 31.410
• B) 30.144
• C) 10.851
• D) 10.117

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