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Asked Dec 8, 2019

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Use a *t*-distribution to answer this question. Assume the samples are random samples from distributions that are reasonably normally distributed, and that a *t*-statistic will be used for inference about the difference in sample means. State the degrees of freedom used.

Find the endpoints of the *t*-distribution with 2.5% beyond them in each tail if the samples have sizes n1=17 and n2=21.

Enter the exact answer for the degrees of freedom and round your answer for the endpoints to two decimal places.

degrees of freedom =

endpoints =±

Step 1

From the given information,

Cumulative tail area (rejection area) = 0.05.

Sample size of first sample (*n*1) = 17.

Sample size of second sample (*n*2) = 21.

Sinc...

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