Use technology and the confidence level and sample data to find the for the popu

Question

Use technology and the confidence level and sample data to find the for the population mean p. Assume that the population does not exhibit a normal distribution Weight lost on a diet confidence n = 61 What is the confidence interval for population mean mu? Is the confidence interval affected by the fact that the data appear to be from a population that is not normally distributed? A. Yes, because the sample size is not large enough. B. No, because the population resembles a normal distribution C. No, because the sample size is large enough D. Yes, because the population does not exhibit a normal distribution

Explanation / Answer

The CI for the population mean = ?

Z for 90% is 1.645

The CI is given by formula = xbar +/- Z*Sigma/sqrt(n), if n>30, Otherwise we use t value instead of Z

So, 4 +/- 1.645*6.7/sqrt(61)

=2.59 to 5.411

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