A university is conducting a survey to study the number of hours students sleep at night during exam week. A sample of 20 students was drawn, and these responses were obtained: 6.5, 5, 8, 5.5, 7, 4, 4.5, 5, 6, 5.5, 4, 7.5, 6, 7, 8, 5, 6, 6.5, 6.5, 5. The standard deviation of the population mean is 2 hours. Arrange the steps in the correct sequence to find the range in which 95% of the sample mean occurs. Tiles The standard error of the mean of the sample is. The range in which 95% of the sample mean occurs is. The range in which 95% of the sample mean occurs is 5.93 + 2 * 0.45 = 6.83 hours and 5.93 - 2 * 0.45 = 5.03 hours. The sample mean is. The 20 students' total number of study hours is 118.5 hours. Calculate the standard deviation.
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