A 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 122 students who averaged 42.7 minutes concentrating on their professor during the hour lecture. The standard deviation was 12.4 minutes. Round answers to 3 decimal places where possible. b. With 90% confidence the population mean minutes of concentration is between ? and ? minutes c. If many groups of 122 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.
A 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 122 students who averaged 42.7 minutes concentrating on their professor during the hour lecture. The standard deviation was 12.4 minutes. Round answers to 3 decimal places where possible.
b. With 90% confidence the population mean minutes of concentration is between ? and ? minutes
c. If many groups of 122 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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