The world’s smallest mammal is the bumblebee bat. Such bats are roughly the size of a large bumblebee. A random sample of 130 of these bats had an average weight of 1.7 grams with a standard deviation...

The world’s smallest mammal is the bumblebee bat. Such bats are roughly the size of a large bumblebee. A random sample of 130 of these bats had an average weight of 1.7 grams with a standard deviation of 0.22 grams.

a. Construct a 90% confidence interval estimate of their mean weight.

b. Construct a 95% confidence interval estimate of their mean weight.

c. Construct a 99% confidence interval estimate of their mean weight.