=+the program increases or decreases productivity. To measure it, they monitor a random sample of 145 employees
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=+the program increases or decreases productivity. To measure it, they monitor a random sample of 145 employees who word process, measuring their hourly key strokes both before and after the program is instituted. Here are the data:
Keystrokes per Hour Before After Difference
(After − Before)
Mean 1534.2 1556.9 22.7 SD 168.5 149.5 113.6 N 145 145 145
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Related Book For 
Business Statistics Plus Pearson Mylab Statistics With Pearson Etext
ISBN: 978-1292243726
3rd Edition
Authors: Norean R Sharpe ,Richard D De Veaux ,Paul Velleman
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