a webassign.net Assignment Scoring Your last submission is used for your score. 1. [0/4 Points] DETAILS PREVIOUS ANSWERS WANEFM7 8.5.051.MI. MY NOTES ASK YOUR TEACHER You may need to use the appropriate appendix table or technology to answer this question. This exercise is based on the following information, gathered from student testing of a statistical software package. Students were asked to complete certain tasks using the software, without any instructions. The results were as follows. (Assume that the time for each task is normally distributed.) Standard Task Mean Time (minutes) Deviation Task 1: Descriptive Analysis of Data 13.0 5.0 Task 2: Standardizing Scores 13.7 9.0 Task 3: Poisson Probability Table 7.3 3.9 Task 4: Areas under Normal Curve 9.1 5.5 Find the probability that a student will take at least 10 minutes to complete Task 1. (Round your answer to four decimal places.) X Need Help? Read It Master It Submit Answer 2. [-/4 Points] DETAILS WANEFM7 8.5.004. MY NOTES ASK YOUR TEACHER You may need to use the appropriate appendix table or technology to answer this question. Z is the standard normal variable. Find the indicated probability. (Round your answer to four decimal places.) P(-1.78 s Z S 1.78) Need Help? Read It 3. [-/4 Points] DETAILS WANEFM7 8.5.016.NVA MY NOTES ASK YOUR TEACHER Find the probability that a normal variable takes on values within 1.3 standard deviations of its mean. (Round your decimal to four decimal places.) 4. [-/4 Points] DETAILS WANEFM7 8.5.021. MY NOTES ASK YOUR TEACHER You may need to use the appropriate appendix table or technology to answer this question. Suppose X is a normal random variable with mean a = 100 and standard deviation o = 10. Find a such that P(X 2 a) = 0.04. Round your answer to one decimal place.) a = Need Help? Read It Watch It 5. [-/4 Points] DETAILS WANEFM7 8.5.031. MY NOTES ASK YOUR TEACHER