A production process has a cycle time, time to produce a part, that is normally distributed with amean of 12.6 minutes and a standard deviation of 2.4 minutes. Let X represent the cycle time for apart being produced.P(X > 17.4) =Answer accurately to 4 decimal places.P( 11.4 < X < 16.2)=Answer accurately to 4 decimal places.97.5 percent of all parts are produced in less thanminutes. Enter your answeraccurate to 1 decimal place.

Answered: A production process has a cycle time,…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Using diaries for many weeks, a study on the lifestyles of visually impaired students was conducted. The students kept track of many lifestyle variables including how many hours of sleep obtained on a typical day. Researchers found that visually impaired students averaged 8.74 hours of sleep, with a standard deviation of 2.55 hours. Assume that the number of hours of sleep for these visually impaired students is normally distributed. Give your answers to 4 decimal places. Use at least 3 decimal places for your z-scores. (a) What is the probability that a visually impaired student gets less than 6.9 hours of sleep? answer: (b) What is the probability that a visually impaired student gets between 6.8 and 9.83 hours of sleep? answer: (c) Fourty percent of students get less than how many hours of sleep on a typical day? answer: hours problem
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Biological oxygen demand (BOD) is a pollution index that is monitored in the treated effluent of paper mills. A certain paper mill has taken 31 samples over the past 3 months. The mean and standard deviation for the sample data are 3.42 and 0.728 ppm respectively. The mill would like to see if this sample indicates that the true average BOD in their treated effluent exceeds the targeted 3.00 ppm. Let ? = 0.05. A) The test statistic, (ttest), for this data set is: Note: Round your answer to the nearest hundredth.B) The p-value is: C) The statistical decision and corresponding English interpretation for this study are: Fail to reject Ha: conclude that the true BOD in treated effluent exceeds 3 ppmFail to reject Ho: we cannot conclude that the true BOD in treated effluent exceeds 3 ppm Reject Ha: we cannot conclude that the true BOD in treated effluent exceeds 3 ppmReject Ho: conclude that the true BOD in treated effluent exceeds 3 ppm
Ore
Paramesan cheese is aged for an average of 24 months to allow it to develop the desire richness in flavor the standard deviation for the length of time Parmesan cheese is aged is 3.7 months How long would Parmesan cheese have to be aged in order to be in the 90th percentile? Assume that the data is normally distributed
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