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Consider the following continuously operation job shop. Inter arrival times of jobs are described as follows:
Time between arrivals (hrs) probability
0 0.23
1 0.37
2 0.28
3 0.12
Processing for jobs are normally distributed, with mean 50 minutes and standard deviation of 8 minutes. Construct a simulation table, and perform a simulation for 10 new customers. Assume that when the simulation begins there is one job being processed (scheduled to be completed in 25 minutes) and there is one job with a 50 minute processing time in the queue.
a) What is the average time for the 10 new jobs?
b) What is the average processing time for the 10 new jobs?
c) What is the maximum time in the system for the 10 new jobs?
One sample has SS = 48 and a second sample has SS = 32. When both samples have n =5, what is each sample variance and computed pooled variance?
Use SPSS to make a scatterplot between stress and coping, and then add the fitted regression line to the plot. Mark both intercept and slope on the plot (You may consider to change the default X scale in SPSS)
Test at 5% significance level null hypothesis that population mean is 40 hours against alternative that it is higher.
The director of a radio broadcasting company wants to determine whether the mean length of commercials on his station is equal to 24 seconds.
Far West University offers both day and evening classes in business administration. One question in a survey of the students inquires how they perceive the prestige associated with certain careers.
There is no significant difference in the mean household incomes between the two neighborhoods +0.05
What does the intercept mean in this context? What is the estimated percent decline in visual field per year?
What is the 99% confidence interval?
The best estimator or appreciative for the population proportion is 0.45. How large must the sample be?
Public transportation and the automobile are two methods an employee can use to get to work each day. Samples of times recorded for each method are shown. Times are in minutes.
What is the P-value of the test, assume the standard deviation is 3 years, a 95% confidence interval for the average time
When studying the simultaneous responses to two categorical questions, we should set up a:
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