Homework_3__6__8__10__14__18_

# Homework_3__6__8__10__14__18_ - pt] b. A population of N =...

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Homework 3: 10 points total [see below] Chapter 4 [6, 8, 10, 14, 18] 6. For the following sample: 2, 2, 4, 1, 3, 2, 1, 2 a. Calculate the range and the standard deviation. (You do not have to calculate the interquartile range). [1 pt] b. Add two points to every score, then compute the range and standard deviation again. How is the variability affected by adding a constant to every score? [1 pt] 8. A distribution of scores has a mean of M = 42. a. If the standard deviation is s = 12, would a score of X = 48 be considered an extreme value? Explain your answer. [1/2 pt] b. If the standard deviation is s = 2, would a score of X = 48 be considered an extreme value? Explain your answer. [1/2 pt] 10. a. A sample of n = 6 scores has a SS = 60. What is the variance for this sample? [1/2

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Unformatted text preview: pt] b. A population of N = 6 scores has SS = 60. What is the variance for this population? [1/2 pt] 14. Calculate SS , variance and standard deviation for the following sample of n = 9 scores: [3 pts] 2, 0, 0, 0, 0, 2, 0, 2, (Note: The computational formula for SS works best with these scores). 18. For the following sample of n = 5 scores: 10, 0, 6, 2, 2 a. Sketch a histogram showing the sample distribution. [1 pt] b. Locate the value of the sample mean in your sketch, and make an estimate of the sample standard deviation. [1 pt] c. Compute SS, variance and standard deviation for the sample. (How well does your estimate compare with the actual value of s?) [1 pt]...
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## Homework_3__6__8__10__14__18_ - pt] b. A population of N =...

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