The length of time needed to complete a certain test is normally distributed with mean 77 minutes and standard deviation 11 minutes. Find the probability that it will take less than 63 minutes to complete the test.

The probability that it will take less than 63 minnutes to complete the test is 0.1003

Step-by-step explanation:

Let X be the amount of time that takes to complete the test. X has Normal distribution with parameters and . In order to find the probability of X being less than 63, we use the

standarization of X, which we will denote W. W is given by

The cumulative distribution function of W, which we denote , has well known values. You can find the values of in the attached file.

Since the desnity function of a standard Normal distribution is symmetric, then we have that for any positive value x.

Therefore, the probability that it will take less than 63 minnutes to complete the test is 0.1003.

your answer is b ^w^ hope i

answer: dead jah

step-by-step explanation:

bullet + jah= dead jah