Chapter 6, Section 4-D, Exercise 186 Incorrect Use a t-distribution to answer th

Question

Chapter 6, Section 4-D, Exercise 186 Incorrect 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 proporti than -1.4 if the samples have sizes n 30 and n2-40 Enter the exact answer for the degrees of freedom and round your answer for the area to three decimal places. e degrees of ion in a i-distribution less 68 degrees of freedom 0.166 proportion SHOW HINT LINK TO TEXT Question Attempts: Unlimited SAVE FOR LATER SUBMIT ANSWER

Explanation / Answer

here from conservative method : degree f freedom =min(n1-1 ; n2-1) =29

proportion =P(t<-1.4)=0.086

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