W#1 BENCH Sample Measures of Spread -- Version A

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Fairleigh Dickinson University *

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2023

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Statistics

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Feb 20, 2024

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W#1 BENCH Sample Measures of Spread -- Version A Compute the sample mean, . Report your response without any insignificant digits. 73 87 81 79 80 - 80 Compute the range for this sample: 73 87 81 79 80 - 14 In order to calculate sample standard deviation, complete the column labeled deviations from mean. Report your responses without insignificant digits, but include signs as necessary. dat a deviations from mean Squared deviations 73 [A] 87 [B] 81 [C] 79 [D] 80 [E] - A = -7 - B = 7 - C = 1 - D = -1 - E = 0 What is the sum of the deviations? - 0 Continue with calculating population standard deviation by completing the column labeled squared deviations dat a deviations from mean Squared deviations 73 [A] 87 [B] 81 [C] 79 [D] 80 [E]

- A = 49 - B = 49 - C = 1 - D = 1 - E = 0 Calculate the sum of the squared deviations - 100 What is the sample size, n , expressed as a numeral ? - 5 Compute the sample variance , S 2 , expressed precisely and without insignificant digits ? - 25 Compute the sample standard deviation S - 5 Determine the coefficient of variation, rounded to the nearest whole percentage and expressed with a percent symbol. - 6% Finally, complete the following sentence, rounding off any answers to the nearest whole unit and expressed without insignificant digits in numeral form. "On average the five sixth grade classes at St. Balthasar Intermediate Academy sold [A] number of subscriptions, give or take [B] number of subscriptions." - A = 80 - B = 5

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W#1 BENCH Sample Measures of Spread -- Version A

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