Constructing the confidence interval for population mean

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Reference no: EM1320401

Q1)

Publisher wishes to evaluate mean length of time (in minutes) all adults spend reading newspapers. To determine this evaluate, publisher takers a random sample of 15 people and obtain results below. Form past studies , the published assumes σ is 2.2 minutes and that population of times is normally distributed.

6,12,11,7,10,9,12,9,7,6,8,6,9

Construct the 90% and 99% confidence interval for population mean. Which interval is wider? If convenient, utilize technology to construct confidence intervals

The 90% confidence interval is ........

The 99% confidence interval is ........

Which interval is wider?

A) The 99 % confidence interval

B) The 90% confidence interval

Reference no: EM1320401

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