中国大学MOOC: The mean is practically meaningless without information of the standard deviation.
举一反三
- The mean is practically meaningless without information of the standard deviation. A: 正确 B: 错误
- Given the following information: Standard deviation = 8 Coefficient of variation = 64% The mean would then be
- The difference between the sample mean and the population mean is called the: A: population deviation. B: population standard deviation. C: standard error of the mean. D: sampling error.
- When measuring the dispersion of the sample mean, the statistics to be used are ( ) . A: Coefficient of variation B: The standard deviation C: Standard deviation of the mean D: Range value
- 中国大学MOOC: A population distribution is normal with a mean of 18 and standard deviation of 4. A sample of 16 observations is selected and a sample mean computed. What is the probability that the sample mean is more than 18?