Explain how exponential functions can model both phenomena

Dr. Clifford Jones claims that the mean weight of bumblebee bats is 1.8 grams. We are interested in whether it's less than he claims. Using the t-distribution technique, answer the following questions.

Assuming that Dr. Clifford is correct, estimate the probability of a sample of 15 bumblebee bats producing an average as low as the one from our sample (one-sided p-value):

1.The degrees of freedom are df =______.

2.The test-statistic t = (positive version of t, three places after decimal) =______.

3.The p-value is between______(smaller) and ______ (larger, exact answers).