Consider a sample with data values of 27, 25, 20, 15, 30, 34, 28, and 25. Perform the following computations WITH and WITHOUT using the Excel commands. a) Compute the 20th, 25th, 65th, and 75th percentiles. b) Compute, the mean and the median c) A revision of the dataset suggests that instead of the value 34 the accurate value is 74. How will this revision affect the mean and the median? What is the more accurate measure of central location in this case? Why?

Holt Mcdougal Larson Pre-algebra: Student Edition 2012
1st Edition
ISBN:9780547587776
Author:HOLT MCDOUGAL
Publisher:HOLT MCDOUGAL
Chapter11: Data Analysis And Probability
Section11.4: Collecting Data
Problem 8E
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Consider a sample with data values of 27, 25, 20, 15, 30, 34, 28, and 25. Perform the following computations WITH and WITHOUT using the Excel commands. a) Compute the 20th, 25th, 65th, and 75th percentiles. b) Compute, the mean and the median c) A revision of the dataset suggests that instead of the value 34 the accurate value is 74. How will this revision affect the mean and the median? What is the more accurate measure of central location in this case? Why?  
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