If a population of N = 10 scores has a mean of 30 and a standard deviation of 5, then the population variance equals
Solution :
Given that,
mean =
= 30 ,
N = 10 and
standard deviation =
= 5
population variance =
2 = 52 = 25
A population of N = 10 scores has a mean of μ = 24 with SS = 160, a variance of σ2 = 16, and a standard deviation of σ = 4. For this population, what is Σ(X − μ)? A. 0. B. 4. C. 16. D. 160
1. (2 points) For the following population N=5, calculate mean, standard deviation, and 7-scores for each score Scores: 8, 5, 4, 6,2
A sample of n = 6 has a mean of M = 32. What is EX? E for sigma Find the mean for the following frequency distribution: X f 10 1 9 2 8 4 7 3 6 2 For the following scores, find the following: Mean Median Mode Based on the three values for central tendency, what is the most likely shape for this distribution of scores (symmetrical, positively skewed, or negatively skewed)? 26 40 21 17 48 31 ...
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A population has a mean of 30 and a standard deviation of 9. If samples of size 36 are collected, find the mean and standard deviation of the sampling distribution. The mean of the sampling distribution is and the standard error is A population has a mean of 30 and a standard deviation of 9. If samples of size 36 are collected, find the mean and standard deviation of the sampling distribution. The mean of the sampling distribution is and...
a ) ( mean, proportion, standard deviance or variance )
B ) is n > 30
C ) determine the parameter to be tested
D ) determine the test to be performed
B )
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