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In a random sample of forty-eight 200-metre swims has a mean time of 312 minutes and a standard deviation of 009 minutes Construct the 89% confidence interval for the population mean time

In a random sample of forty-eight 200-metre swims has a mean time of 3.12 minutes and a standard deviation of 0.09 minutes.(a) Construct the 89% confidence interval for the population mean time.(b) If all the other quantities remain the same, how does the indicated change affect thewidth of the confidence interval?(i) Increase in the sample size(ii) Increase in the level of confidence.

Apr 04 2020 View more View Less

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