Assume that the time required to download a file from the Internet is exponentially distributed with mean equal to 4 minutes. What is the probability that a download will require at least 2 but not more than 4 minutes?
Question 2
For a multiple regression model, SST = 200 and SSE = 50 . The multiple coefficient of determination is
a. 0.25
b. 4.00
c. 250
d. 0.75