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A nutrition expert claims that the average American is overweight. To test his claim, a random...

A nutrition expert claims that the average American is overweight. To test his claim, a random sample of 20 Americans was selected, and the difference between each person's actual weight and idea weight was calculated. For this data, we have x¯=19.5 and s=29.8. Is there sufficient evidence to conclude that the expert's claim is true? Carry out a hypothesis test at a 4% significance level. Hint: Pay attention to the variable being measured: the difference between actual weight and ideal. A positive value indicates that the person is overweight.

A. The value of the standardized test statistic (give to 3 decimal places):


B. The p-value is (give to 4 decimal places):


C. Your decision for the hypothesis test:
A. Reject H0H0.
B. Reject HaHa.
C. Do Not Reject H0H0.
D. Do Not Reject HaHa.

math   Statistics-And-Probability   
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