Question

State the final conclusion from the given information. Assume a = 0.05 for all cases.

a) Original claim: The mean body temperature of healthy adults is 98.6 degrees Fahrenheit. Initial conclusion: Fail to reject the null hypothesis.

b) Original claim: The proportion of people who pay their credit card balance in full each month is less than 25%. Initial conclusion: Reject H₀.

c) Original claim: The mean age of community college students is at most 40 years old. Initial conclusion: Reject H₀.

Answer 1

Ans:

a)

Final conclusion:

At 0.05 significance level,there is not sufficient evidence to reject the claim that the mean body temperature of healthy adults is 98.6 degrees.

b)

Final conclusion:

At 0.05 significance level,there is sufficient evidence to support the claim that the proportion of people who pay their credit card balance in full each month is less than 25%.

c)

Final conclusion:

At 0.05 significance level,there is sufficient evidence to reject the claim that the mean age of community college students is at most 40 years old.