Question

Use a t-distribution to find a confidence interval for the difference in means - μ 2 using the relevant sample results from paired data. Assume the results come from random samples from populations that are approximately normally distributed, and that differences are computed using d = x 1 - x 2 . A 90% confidence interval for μ d using the paired difference sample results x ¯ d = 566.9 , s d = 140.3 , n d = 100 . Give the best estimate for μ d , the margin of error, and the confidence interval. Enter the exact answer for the best estimate, and round your answers for the margin of error and the confidence interval to two decimal places. find margin of error, best estimate, and the 90% confidence interval

Answer 1

given data are:-

a). best estimate for is = 566.9

b).df = (n_d-1) = (100-1)

t critical value for 90% confidence level, both tailed test be:-

[ in any blank cell of excel type =T.INV.2T(0.1,99) press enter]

the margin of error be:-

c).the 90% confidence interval be:-

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