Question: #6A researcher is interested in finding a 90% confidence interval for the mean number minutes students are concentrating on their professor during a one hour

#6A researcher is interested in finding a 90% confidence interval for the mean number minutes students are concentrating on their professor during a one hour statistics lecture. The study included 114 students who averaged 39.1 minutes concentrating on their professor during the hour lecture. The standard deviation was 13.9 minutes.Round answers to 3 decimal places where possible.

a. To compute the confidence interval use a?Z OR Tdistribution.

b. With90% confidence the population mean minutes of concentration is between_____and _________minutes.

c.If many groups of 114 randomly selected members are studied, then a different confidence interval would be produced from each group. About______percent of these confidence intervals will contain the true population mean minutes of concentration and about__________percent will not contain the true population mean minutes of concentration.

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