Chapter 6, Section 4-D, Exercise 184 LINK TO TEXT SAVE FOR LATER SUBMIT ANSWER C

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Chapter 6, Section 4-D, Exercise 184

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Chapter 6, Section 4-D, Exercise 184

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=15 and n2=23.

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

degrees of freedom =

endpoints =±

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Explanation / Answer

Degrees of freedom = n1 + n2 - 2 = 15 + 23 -2 = 36

Endpoints : -/+ 2.0281

This value is found using the excel formula =T.INV(0.025,36). Value found using this is negative but the same value is symmetric about the mean and sign changes.

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