1. You are designing a great experiment for your boss. It has four treatments and an anticipated error variance of 3. Your boss gives you an alternative mean scenario, and you work out that you need 10 units per treatment to achieve 90% power when testing at error rate 0.01. You’re all set to send the instructions off to the technicians when you boss rushes in and confesses, “Oops, 3 was the anticipated error standard deviation, not the variance. The anticipated error variance is 9.” Approximately how many units are you going to need per treatment for the same alternative to achieve 90% power when testing at 0.01. Explain your answer.

A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
Section: Chapter Questions
Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...
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1. You are designing a great experiment for your boss. It has four treatments and an anticipated error variance of 3. Your boss gives you an alternative mean scenario, and you work out that you need 10 units per treatment to achieve 90% power when testing at error rate 0.01. You’re all set to send the instructions off to the technicians when you boss rushes in and confesses, “Oops, 3 was the anticipated error standard deviation, not the variance. The anticipated error variance is 9.” Approximately how many units are you going to need per treatment for the same alternative to achieve 90% power when testing at 0.01. Explain your answer.
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