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

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter4: Equations Of Linear Functions
Section4.5: Correlation And Causation
Problem 11PPS
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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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