The amount of time that customers wait in line during peak hours at one bank is normally distributed with a mean of 13 minutes and a standard deviation of 3 minutes. The percentage of time that the waiting time lies between 11 and 13 minutes is equal to the area under the standard normal curve between ___ and ___.

It is between -067 and 0.

Step-by-step explanation:

In order to do the calculation, we employ the formula z score because random variables are standardized into z scores. Another name for the z score is standard score and its formula is as given below:

P(L ≤ x ≤ H) = P{[(L - H) ÷ SD] ≤ z ≤ [(H - H) ÷ SD]} (1)

P = probability notation

L = Lower number = 11

H = Higher number = 13

SD = Standard deviation = 3

Substituting the above values into equation (1), we will obtain:

P(11 ≤ x ≤ 13) = P{[(11 - 13) ÷ 3] ≤ z ≤ [(13 - 13) ÷ 3]}

                    = P{[(-2) ÷ 3] ≤ z ≤ [0 ÷ 3]}

                    = P{-0.67 ≤ z ≤ 0}

Therefore, the percentage of time that the waiting time lies between 11 and 13 minutes is between -067 and 0 under the standard normal curve area.

answer: the answer is 5/22

step-by-step explanation: if you subtract 17 from 22 the answer is 5 therefore the remainder of students are female

question

what is the value of the third quartile of the data set represented by this box plot? a. 19 b. 21 c. 26 d. 29

answer

c