In one variation of a study conducted by Privitera, Cooper, and Cosco (201), par

Question

In one variation of a study conducted by Privitera, Cooper, and Cosco (201), participants were asked to eat fast or slow, and the amount consumed in their meal was recorded. In this study (M+- SD), participants who ate slowly consumed 627 +- 183 kilocalories; participants who ate fast consumed 670 +- 184 kilocalories. Assuming these data are normally distributed,
(a) In which group, the slow group or the fast group, was it more likely that participants consumed greater than 700 kilocalories in their meal?
(b) In which group, the slow group or the fast group, was it more likely that participants consumed less than 600 kilocalories in their meal?

Explanation / Answer

a) In the slow group the consumed calories confidence interval ranges between : 544-810 whereas in the fast group the consumed calories confidence interval ranges between 486-854. It is more likely that participant consumed greater than 700 kcal in the group where participants consumed fast.

b) For the slow group it is more likely that the participants consume less than 600 kcal

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