The eating habits of 12 bats were examined in the article “Foraging Behavior of the Indi...

The eating habits of 12 bats were examined in the article “Foraging Behavior of the Indian False Vampire Bat” (Biotropica [1991]: 63– 67). These bats consume insects and frogs. For these 12 bats, the mean time to consume a frog was = 21.9 minutes. Suppose that the standard deviation was s = 7.7 minutes. Construct and interpret a 90% confidence interval for the mean suppertime of a vampire bat whose meal consists of a frog. What assumptions must be reasonable for the one-sample t interval to be appropriate?