Given the following information:
Standard deviation = 8 Coefficient of variation = 64%
The mean would then be
Standard deviation = 8 Coefficient of variation = 64%
The mean would then be
12.5
举一反三
- 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
- B1型题 表示正态分布的资料中数据的离散程度最常用的指标为（） A: mean B: vanance C: percentile D: standard deviation E: coefficient of variation
- Going back to the earlier data set of human second molar breadth, calculate the following:What is the range (measured to 0.1 mmm)______ What is the standard deviation (measured to 0.1 mmm)______ What is the coefficient of variation (measured to 0.1)______
- Which of the following about the normal distribution is NOT true? A: Theoretically, the mean, median, and mode are the same B: About 68% of the observations fall within ±1 standard deviation from the mean C: Its parameters are the mean, μ, and standard deviation, σ D: It is a discrete probability distribution.
- Given an infinite population with a mean of 75 and a standard deviation of 12, the probability that the mean of a sample of 36 observations, taken at random from this population, exceeds 78 is:
内容
- 0
The standard error of the mean is never larger than the standard deviation of the population.
- 1
2.Which of the following about the normal distribution is NOT true A: Theoretically, the mean, median, and mode are the same. B: About 2/3 of the observations fall within ±1 standard deviation from the mean. C: It is a discrete probability distribution. D: Its parameters are the mean, μ, and standard deviation, σ.
- 2
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
- 3
Presenting as mean ± standard deviation, the results were analyzed with SPSS 23.
- 4
Let X be a normal random variable with mean 20 and standard deviation 4. The 90th percentile of X is ____________.