In a test of physical fitness, a group of men ages 65 and older from a local retirement community were told to do as many sit-ups as they could. It is known that the population mean is 20 with . The scores for the men from the retirement community are
given below. Use a two-tailed rejection region with a total area of 0.05 . What should you conclude? 24 25 10 23 18 29 47 32 19 24 20 28 21 20 27 25
a. Since the z-value falls within the region of rejection, we should conclude this sample mean likely represents some other population.
b. Since the z-value does not fall within the region of rejection, we should not conclude this sample mean represents some other population.
c. Since the z-value falls within the region of rejection, we should not conclude this sample mean represents some other population.
d. Since the z-value does not fall within the region of rejection, we should conclude this sample mean likely represents some other population.
A
Ref: 1513015686
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