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R these right? Question 17 What is the mean for the following set of scores: 20, 24, 26, 22, 18, 16, 18: O 14.57 O

R these right?

Question 17 What is the mean for the following set of scores: 20, 24, 26, 22, 18, 16, 18: O 14.57 O 18 O 24 20.57 Question 18 Which of the following measures how scores differ from each other? skewness O variability O average O kurtosis

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