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 =005 . .
What is the critical value? A) 31.410 B) 30.144 C) 10.851 D)
10.117
Test firemen’s claim.
i) Null and Alternative Hypotheses
ii) Test Statistic
iii) Decision
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