Question

my C Cour The times per week a student uses a lab computer are normally distributed, with a mean of 5.9 hours and a standard deviation of 1.4 hours. A student is randomly selected. Find the following probabilities. Anno (a) Find the probability that the student uses a lab computer less than 4 hours per week. (b) Find the probability that the student uses a lab computer between 6 and 8 hours per week. (c) Find the probability that the student uses a lab computer more than 9 hours per week. Hom Qulza (a) The probability that a student uses a lab computer less than 4 hours per week is (Round to three decimal places as needed.) Study (b) The probability that a student uses a lab computer between 6 and 8 hours per week is (Round to three decimal places a as needed.) Gradi (c) The probability that a student uses a lab computer more than 9 hours per week is Statc (Round to three decimal places as needed.) Chap grad Tools Multi Enter your answer in each of the answer boxes. Pears Servi Terms of Use | Privacy Policy | Copyright O 2019 Pearson Education Inc. All Rights Reserved Discussions T 9153 2 FS F4 F3 ...

Answer 1

Let xbe the nandam variable the times per afaing toeek a studant uses a lab emputor Given N(A- - (-") 9.02 5- Phroloability thad a student uses a lab- computer less than 4 hours pen tweek PIX4] 4-5.9 X-5.9 P 1.4 1-4 X-54 P 0.092 - 1.3571 1-0 9082= 1.4 () Peobabilty that a student uses a lab- cemputer between 6 ard & hours per week is P 6-5.9 X-54 X-5.4 14 14 1-4 14 ]- 1 X-5.4 XI5.9 c LI.5 0 14 1.4 0.405 0.433 -0.528 9-6.9 XI5.4 1- P 17 1.4 144 1 PX 5.9 4 2.214S 0.996