Question

A study of long-distance phone calls made from Grameen Phone in Dhaka revealed the
length of the calls, in minutes, follows the normal probability distribution. The mean length
of time per call was 4.2 minutes and the variance was 0.36 minutes square.
i. What is the probability that calls last between 4.2 and 5 minutes?
ii. What is the probability that calls last more than 5 minutes?
iii. What is the probability that calls last exactly 6 minutes?
iv. As part of her report to the president, the director of communications would like to
report the length of the longest (in duration) 4% of the calls. What is this time?

Answer 1

Step-by-step explanation:

here's your answer hope it helps