Use the following to answer questions :
A sample of 20 from a population produced a mean of 66.0 and a standard deviation of 10.0.A sample of 25 from another population produced a mean of 58.6 and a standard deviation of 13.0.Assume that the two populations are normally distributed and the standard deviations of the two populations are equal.
The null hypothesis is that the two population means are equal,while the alternative hypothesis is that the two population means are different.The significance level is 5%.
-What are the critical values of t for the hypothesis test?
A)-2.014 and 2.014
B)-2.017 and 2.017
C)-1.681 and 1.681
D)-1.679 and 1.679

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The Answer of Use the following to answer questions :
A sample of 20 from a population produced a mean of 66.0 and a standard deviation of 10.0.A sample of 25 from another population produced a mean of 58.6 and a standard deviation of 13.0.Assume that the two populations are normally distributed and the standard deviations of the two populations are equal.
The null hypothesis is that the two population means are equal,while the alternative hypothesis is that the two population means are different.The significance level is 5%.
-What are the critical values of t for the hypothesis test?
A)-2.014 and 2.014
B)-2.017 and 2.017
C)-1.681 and 1.681
D)-1.679 and 1.679

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