Content X MindTap - Cengage Learning X using a z-score table - Bing videc x + X C & https:/g.cengage.com/staticb/ui/evo/index.html?deploymentld=60645915522851086336090691&elSBN=9780357905692&id=1444109380&snapshotld=2819269& ... CENGAGE | MINDTAP Q Search this course LP (Lerato) v Pre-class Assignment 6 X Assignment: Pre-class Assignment 6 Assignment Score: 75.41% Save Submit Assignment for Grading A-Z Questions Exercise 06.23 (Normal Probability Distribution) Question 4 of 4 2. Hint(s) Check My Work 3. 4 . The time needed to complete a final examination in a particular college course is normally distributed with a mean of 80 minutes and a standard deviation of 10 minutes. Answer the following questions. a. What is the probability of completing the exam in one hour or less (to 4 decimals)? 0.0228 0 b. What is the probability that a student will complete the exam in more than 60 minutes but less than 75 minutes (to 4 decimals)? 0.2857 c. Assume that the class has 60 students and that the examination period is 90 minutes in length. How many students do you expect will be unable to complete the exam in the allotted time (to nearest whole number)? 0.1587 x Hide Feedback Partially Correct Hint(s) Check My Work O- Icon Key Exercise 06.23 (Normal Probability Distribution) m AofA Type here to search O B. X 16.C Rain showers ~ 9 () ENG 07:53 2022/04/04 23Content X MindTap - Cengage Learning X using a z-score table - Bing videc x + X C & https:/g.cengage.com/staticb/ui/evo/index.html?deploymentld=60645915522851086336090691&elSBN=9780357905692&id=1444109380&snapshotld=2819269& ... CENGAGE | MINDTAP Q Search this course LP (Lerato) v Pre-class Assignment 6 X Assignment: Pre-class Assignment 6 Assignment Score: 75.41% A-7 Save Submit Assignment for Grading Questions Exercise 06.19 (Normal Probability Distribution) Question 3 of 4 1 . Hint(s) Check My Work 2. 3 Automobile repair costs continue to rise with the average cost now at $367 per repair (U.S. News & World Report website). Assume that the cost for an automobile repair is normally distributed with a standard deviation of $88. Answer the following questions about the cost of automobile repairs. 4. a. What is the probability that the cost will be more than $450 (to four decimals)? 0.1736 b. What is the probability that the cost will be less than $250 (to four decimals)? 0.0918 c. What is the probability that the cost will be between $250 and $450 (to four decimals)? 0.7346 d. If the cost for your car repair is in the lower 5%% of automobile repair charges, what is your cost (to two decimals)? $ 223.56X Hide Feedback Partially Correct Hint(s) Check My Work O- Icon Key Type here to search O B. X 16.C Rain showers ~ 9 () ENG 07:53 2022/04/04 123Content X MindTap - Cengage Learning X using a z-score table - Bing videc x + X C & https:/g.cengage.com/staticb/ui/evo/index.html?deploymentld=60645915522851086336090691&elSBN=9780357905692&id=1444109380&snapshotld=2819269& ... CENGAGE | MINDTAP Q Search this course LP (Lerato) v Pre-class Assignment 6 X Assignment: Pre-class Assignment 6 Assignment Score: 75.41% Save Submit Assignment for Grading A-7 Questions Exercise 06.15 (Normal Probability Distribution) Question 2 of 4 1. Hint(s) Check My Work 2 Given that z is a standard normal random variable, find z for each situation (to 2 decimals). Enter negative values as negative numbers. 4 P a. The area to the left of z is 0.2119. 0.80 b. The area between -z and z is 0.9030. x c. The area between -z and z is 0.2052. x d. The area to the left of z is 0.9948. 2.56 0 e. The area to the right of z is 0.6915. -0.50 0 "Hide Feedback Partially Correct Hint(s) Check My Work Type here to search O B. X 16.C Rain showers ~ 9 ()) ENG 07:53 2022/04/04 123