In: Statistics and Probability
The world's smallest mammal is the bumblebee bat. The mean weight of 100 randomly selected bumblebee bats is 1.659 grams, with a standard deviation of 0.264 grams.
Part 2 Dr. Clifford Jones claims that the mean weight of bumblebee bats is 1.7 grams. We are interested in whether it's less than he claims. Using the t-distribution technique, is there evidence that bumblebee bats weight less on average than he claims, at each of the following levels?
The degrees of freedom are df =
The test-statistic t = (positive version of t, three places after decimal) =
Conclusion: There is sufficient evidence to support the claims i.e. there is no evidence that bumblebee bats weight less on average than he claims.