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Should we use a one-tailed or two-tailed test?

Should we use a one-tailed or two-tailed test?

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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Dr. Chung, a renowned dietitian, claims having a balanced breakfast increases productivity. To substantiate his claim, he asks one group of participants to eat breakfast and another to go without it. Then he measures their performance on a cognitive task (1-10). Breakfast Group 8 6 8 8 No Breakfast Group 6 6 5 5 Should we use a one-tailed or two-tailed test? Two-tailed T-Test One-tailed T-Test
Transcribed Image Text:Dr. Chung, a renowned dietitian, claims having a balanced breakfast increases productivity. To substantiate his claim, he asks one group of participants to eat breakfast and another to go without it. Then he measures their performance on a cognitive task (1-10). Breakfast Group 8 6 8 8 No Breakfast Group 6 6 5 5 Should we use a one-tailed or two-tailed test? Two-tailed T-Test One-tailed T-Test
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