Question
A news report states that the 90% confidence interval for the mean number of daily calories consumed by participants in a medical study is (2080,
A news report states that the 90% confidence interval for the mean number of daily calories consumed by participants in a medical study is (2080, 2300). Assume the population distribution for daily calories consumed is normally distributed and that the confidence interval was based on a simple random sample of 18 observations. The margin of error used in the computation of the 90% confidence interval is 110. Calculate thestandard deviation, s,based on the stated confidence interval. Use the t distribution in your calculations and giveyour answer to4 decimal places.
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