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Find the confidence interval for sample

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Reference no: EM132160561

Since 2007, a psychological association has supported an annual nationwide survey to examine stress across the United States. One year, a total of 770 millennials (18- to 33-year-olds) were asked to indicate their average stress level (on a 10-point scale) during a month. The mean score was 5.5. Assume that the population standard deviation is 2.6.

Give the margin of error for a 95% confidence interval. (Enter your answer to three decimal places.)

Find the 95% confidence interval for this sample. (Enter your answers to three decimal places.) (_____,_____)

Give the margin of error for a 99% confidence interval. (Enter your answer to three decimal places.)

Find the 99% confidence interval for this sample. (Enter your answers to three decimal places.) (_____,_____)

How do the results compare with those in part (a)?

Reference no: EM132160561

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