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6 years ago
The health of employees is monitored by periodically weighing them in.
 
  A sample of 54 employees has a mean weight of 183.9 lb. Assuming that  is known to be 121.2 lb, use a 0.10 significance level to test the claim that the population mean of all such employees weights is less than 200 lb.
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6 years ago
:  = 200; :  < 200; Test statistic: z = -0.98. P-value: 0.1635. Fail to reject . There is not sufficient evidence to warrant the rejection of the claim that the mean equals 200.
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