8.11 Determine the margin of error for a 95% confidence interval for the difference between population means

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8.11 Determine the margin of error for a 95% confidence interval for the difference between population means for each of the following (assume equal population variances):

a. nx = 100 s2x

= 36 x = 300 ny = 64 s2y

= 49 y = 320

b. nx = 25 s2x = 36 x = 300 ny = 16 s2y = 49 y = 320

c. The sample sizes in part a are 4 times larger than the sample sizes in part

b. Comment on your answers to part a compared to your answers to part b.
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Essential Mathematics And Statistics For Science

ISBN: 9780470694480

2nd Edition

Authors: Graham Currell, Dr. Antony Dowman

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8.11 Determine the margin of error for a 95% confidence interval for the difference between population means

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