A population has a mean of 37 and a standard deviation of 13. A sample of size 5 is taken at random from this population. The standard error of the sample mean equals (up to three decimal places):单项选择题

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Question at position 10 A simple random sample of 100 observations was taken from a large population. The sample mean and the standard deviation were determined to be 80 and 12, respectively. Calculate the standard error of the mean and identify the final answer. NOTE: Please provide your calculation and final answer in separate blank spaces. The calculation is: Question Blank 1 of 2[input] The final answer is: Question Blank 2 of 2[input]

位置1的问题 From a population of 500 elements, a sample of 225 elements is selected. It is known that the variance of the population is 900. The standard error of the mean is approximately 题库 1/1[input]. (Note: your answer should retain THREE decimal places.)

The professor of a large probability class randomly selected 8 students and asked the amount of time (in hours) spent for her course per week. The data are given below. 7 9 5 12 14 6 10 3 Estimate the standard error of the estimated time spent in a week for this course by the students who are taking this course (round off to first decimal place).

An automotive repair shop has determined that the average service time on an automobile is 20 hours with a standard deviation of 320 minutes. A random sample of 160 services is selected. Assuming the population consists of 2,000 services. Determine the standard error of the mean. Hint: Use the finite population correction factor.  

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