Statistics for The Behavioral Sciences (MindTap Course List)
Statistics for The Behavioral Sciences (MindTap Course List)
10th Edition
ISBN: 9781305504912
Author: Frederick J Gravetter, Larry B. Wallnau
Publisher: Cengage Learning
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Confidence Intervals
When we calculate intervals in probability and statistics, it can be simply termed as finding out a confidence interval. The confidence interval is usually calculated from the data set which is observed. The value of the parameter that needs to be calcul…
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Chapter 4, Problem 19P

The range is completely determined by the two extreme scores in a distribution. The standard deviation on the, other hand uses every score.

  1. Compute the range (choose either definition) and the standard deviation for the following sample of n = 5 scores. Note that there are three score clustered around the mean in the center of the distribution and two extreme values.
    2. Scores: 0, 6, 7, 8, 14.

  • Now we will break up the cluster in the center of the distribution by moving two of the central scores out to the extremes. Once again compute the range and the standard deviation.
    • New scores: 0, 0, 7, 14, 14.

  • According to the range how do the two distributions compare in variability? How do they compare according to the standard deviation?

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    Chapter 4 Solutions

    Statistics for The Behavioral Sciences (MindTap Course List)

    Ch. 4 - In words, explain what is measured by SS,...Ch. 4 - Is it possible to obtain a negative value for the...Ch. 4 - Describe the scores in a sample that has standard...Ch. 4 - There are two different formulas or methods that...Ch. 4 - Calculate the mean and S,S (sum of squared...Ch. 4 - Calculate ss, variance and standard deviation for...Ch. 4 - Calculate ss. variance and standMd deviation for...Ch. 4 - For the foUow.ing population of N=6 score: l...Ch. 4 - For the fol1owing set of scores: 1, 4, 3, 5, 7 a....Ch. 4 - Prob. 10P
    Ch. 4 - For the fol1owing sample of n = 6 scores: 0, 11, 5...Ch. 4 - 12. Calculate SS, variance and standard deviation...Ch. 4 - Prob. 13PCh. 4 - A population has a mean of µ = 50 and a standard...Ch. 4 - a. After 6 points have been added to every score...Ch. 4 - 16. Compute the mean and standard deviation for...Ch. 4 - For the following sample of n = 8 scores: 0, 1, ½,...Ch. 4 - For the following population of N=6 scores...Ch. 4 - The range is completely determined by the two...Ch. 4 - For the data in the following sample: ,6,8,6,5...Ch. 4 - 21 . Within a population. the differences that...Ch. 4 - Wegesin and Stern (2004) found greater consistency...Ch. 4 - A population has a mean of =50 and a standard...Ch. 4 - On an exam with a mean of M=78 , you obtain a...
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