Question

QUESTION 1 2 points Save Answer Using the information below, answer the next 6 questions: Yoonie is a personnel manager in a large corporation. Each month she must review 16 of the employees. From past experience, she has found that the reviews take her approximately four hours each to do with a population standard deviation of 1.2 hours (1) What is the mean time to complete one review? QUESTION 2 2 points Save Answer (2) What is the standard deviation to complete one review? QUESTION 3 4 points Saved (3) What is the probability that one review will take Yoonie from 3.5 to 4.25 hours? (Round to 3 decimal places) 0.749 QUESTION 4 2 points Save Answer What is the mean time for Yoonie to complete the 16 reviews? QUESTION 5 4 points Save Answer (5) What is the standard deviation for her to complete the 16 reviews? QUESTION 6 4 points Save Answer (6) What is the probability that 16 reviews will take Yoonie from 3.5 to 4.25 hours? (Round to three decimal places)

Answer 1

Jolution- The mean time 2) the standard to complete one review = Whouts deviation 12 hours ] 3) P(3.52Z 242-1) = P(2.52 2-4 < 4.25) - 1.2 0.4167 22 20 208) - pl ZL0.208) - P(Z <-0.416+) -Y05823-0.33&4 = 0.2439 p13.5<2L 4.25) = 0.24397 4) The mean . time time to to complete complete to to review = 1 review =14 hours 5) The standard deviation - 0.3 - JIG . The standard deviation for 16 review =0.3 a p(3.5%2C4.25) = P(3.52 You 24.25) 14.25- 13.5-4 12 P - 7 < < 412 vico = P(-1067 <2<0.834) - PlzL0.834 ) - P(Z2-1.67) 07978-0.0474 :0.7504 1p(3.52224:25)=0.7504 7