3) The 90% confidence interval for the true mean of national statistics examination scores is 81 _...
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Question:
- 3) The 90% confidence interval for the true mean of national statistics examination scores is 81 _ _ 87. Assume that the population standard deviation was not known and _ 30.
- i) Find the standard deviation of the sample mean for the data used to obtain the confidence interval.
- ii) Construct and interpret the 95% confidence interval for the true mean of national statistics examination scores.
Related Book For
Statistics For Business And Economics
ISBN: 9780132745659
8th Edition
Authors: Paul Newbold, William Carlson, Betty Thorne
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