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A diet doctor claims that the average North American is more than 20 pounds overweight. To test her claim, a random sample of 20 North
- A diet doctor claims that the average North American is more than 20 pounds overweight. To test her claim, a random sample of 20 North Americans was weighed, and their actual weight subtract their ideal weight was calculated. The data is listed below: 29 marks
16 23 18 41 22 18 23 19 22 15
18 35 16 15 17 19 23 15 16 26
The sample statistics are: = 20.85, = 6.76.
Can we infer, at the 5% significance level, that the doctor's claim is true? Assumethe required conditions are satisfied.
H0 : = 20
H1 : > 20
Conclusion: Reject H0 Do not reject H0
Reason for conclusion:there is not enough evidence to support the claim that the average North American is more than 20 pounds overweight at the 5% significance level.
What are the required conditions for this test?
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