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
A: Coefficient of variation
B: The standard deviation
C: Standard deviation of the mean
D: Range value
举一反三
- Given the following information: Standard deviation = 8 Coefficient of variation = 64% The mean would then be
- The standard error of the mean is never larger than the standard deviation of the population.
- A sample of size 40 is to be taken from an infinite population whose mean and standard deviation are 68 and 12, respectively. The probability that the sample mean will be larger than 70 is:
- 以下哪个统计量指标不用于描述数据集的离散程度。 A: Variation B: Standard Deviation C: Range D: Geometric Mean
- 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?