Essentials of Statistics for The Behavioral Sciences (MindTap Course List)
9th Edition
ISBN: 9781337098120
Author: Frederick J Gravetter, Larry B. Wallnau, Lori-Ann B. Forzano
Publisher: Cengage Learning
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Textbook Question
Chapter 12.5, Problem 1LC
Under what circumstances are post hoc tests necessary after an ANOVA?
- a. When H0 is rejected
- b. When there are; more than two treatments
- c. When H0 is rejected and there are more than two treatments
- d. You always should do post hoc tests after an ANOVA.
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Question 2: When John started his first job, his first end-of-year salary was $82,500. In the following years, he received salary raises as shown in the following table.
Fill the Table: Fill the following table showing his end-of-year salary for each year. I have already provided the end-of-year salaries for the first three years. Calculate the end-of-year salaries for the remaining years using Excel. (If you Excel answer for the top 3 cells is not the same as the one in the following table, your formula / approach is incorrect) (2 points)
Geometric Mean of Salary Raises: Calculate the geometric mean of the salary raises using the percentage figures provided in the second column named “% Raise”. (The geometric mean for this calculation should be nearly identical to the arithmetic mean. If your answer deviates significantly from the mean, it's likely incorrect. 2 points)
Hint for the first part of question 2: To assist you with filling out the table in the first part of the question,…
Consider a sample with data values of 27, 25, 20, 15, 30, 34, 28, and 25. Compute the range, interquartile range, variance, and standard deviation (to a maximum of 2 decimals, if decimals are necessary).
Range
Interquartile range
Variance
Standard deviation
Perform a Step by step following tests in Microsoft Excel. Each of the following is 0.5 points, with a total of 6 points. Provide your answers in the following table.
Median
Standard Deviation
Minimum
Maximum
Range
1st Quartile
2nd Quartile
3rd Quartile
Skewness; provide a one sentence explanation of what does the skewness value indicates
Kurtosis; provide a one sentence explanation of what does the kurtosis value indicates
Make a labelled histogram; no point awarded if it is not labelled
Make a labelled boxplot; no point awarded if it is not labelled
Data
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30
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26
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Chapter 12 Solutions
Essentials of Statistics for The Behavioral Sciences (MindTap Course List)
Ch. 12.1 - How many levels are there in a single-factor...Ch. 12.1 - When is the distinction between the testwise alpha...Ch. 12.1 - Which of the following accurately describes the...Ch. 12.2 - For an analysis of variance, the differences...Ch. 12.2 - What is suggested by a large value for the F-ratio...Ch. 12.3 - An analysis of variances produces dfbetween...Ch. 12.3 - An analysis of variance is used to evaluate the...Ch. 12.3 - A research study compares three treatments with n...Ch. 12.4 - A researcher uses analysis of variance to test for...Ch. 12.4 - The following table shows the results of an...
Ch. 12.4 - A research report concludes that there are...Ch. 12.5 - Under what circumstances are post hoc tests...Ch. 12.5 - Prob. 2LCCh. 12.6 - Which combination of factors is most likely to...Ch. 12.6 - If an analysis of variance is used for the...Ch. 12.6 - A researcher uses an ANOVA to evaluate the mean...Ch. 12 - Why should you use ANOVA instead of several t...Ch. 12 - What value is expected for the F-ratio, on...Ch. 12 - Describe the similarities between an F-ratio and a...Ch. 12 - Calculate SSwith, SSbetween, SSwithin for the...Ch. 12 - A researcher uses an ANOVA to compare three...Ch. 12 - A researcher reports an F-ratio with dfbetween2...Ch. 12 - A researcher reports an F -ratio with df = 3.24...Ch. 12 - The following values are from an...Ch. 12 - A researcher conducts an experiment comparing four...Ch. 12 - The following summary table presents the results...Ch. 12 - A developmental psychologist is examining the...Ch. 12 - The following data were obtained from an...Ch. 12 - The following data were obtained from an...Ch. 12 - A research study comparing three treatment...Ch. 12 - The following values are from an...Ch. 12 - A research report from an independent-measures...Ch. 12 - Several factors influence the size of the F-ratio....Ch. 12 - A researcher used ANOVA and computed F = 4.25 for...Ch. 12 - The following Data were obtained from an...Ch. 12 - For the preceding problem you should find that...Ch. 12 - The following data summarize the results from an...Ch. 12 - To create the following data we started with the...Ch. 12 - An ANOVA produces an F-ratio with df 1.34. Could...Ch. 12 - The following scores are from an independent...
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