What are all the interactions?多项选择题

A

AB

B

AC

C

BC

D

ABC

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Question at position 19 A research team studies diet type (vegetarian vs. non-vegetarian) and exercise intensity (low vs. high) on energy levels. Energy levels are higher with a vegetarian diet regardless of exercise intensity, but exercise has a greater impact on energy for non-vegetarians. What type of result is this?No interaction, only main effectsMain effect of exercise onlyMain effects of both diet and exercise with an interactionMain effect of diet only

Question at position 5 A research team studies diet type (vegetarian vs. non-vegetarian) and exercise intensity (low vs. high) on energy levels. Energy levels are higher with a vegetarian diet regardless of exercise intensity, but exercise has a greater impact on energy for non-vegetarians. What type of result is this?No interaction, only main effectsMain effect of diet onlyMain effects of both diet and exercise with an interactionMain effect of exercise only

TRUE OR FALSE: Chang and Lauderdale statistically interact poverty income ratio with survey year in order to test whether relationships between income and cholesterol levels change over time.

In a study with variables X and Y, is it possible that X has no main effect, Y has no main effect, yet the interaction of X and Y is significant? 

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