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The following represents a project that should be scheduled using CPM:
TIMES(days.)
Activity IMMEDIAPTREE DECESSORS a m bA - 1 3 5B - 1 2 3C A 1 2 3D A 2 3 4E B 3 4 11F C, D 3 4 5G D, E 1 4 6H F, G 2 4 5
a. Draw the network.b. What is the critical path?c. What is the expected project completion time?d. What is the probability of completing this project within 16 days?
A survey of 120 high school students shows that 39 of them work over 20 hours per week during the school year. Does it demonstrate the conjecture that more than 25% of the high school students work over 20 hours per week during the school year?
Find out the regression equation Determine the value of Rsquare? Comment on value.
A law student, who want to check a professor's claim that convicted embezzlers spend on average 12.3 months in jail, takes a random sample of 36 such cases from court files.
A sample of 350 lenses and found 5 lenses with surface defects. Formulate an appropriate test for the qualification of the polishing machine using an α = 0.05."
The data below shows the time to process an inpatient admission, before and after a system usage training session was given. The following hypotheses were formulated for this study.
If light bulbs have lives that are normally distributed with a mean of 2500 hours and a standard deviation of 500 hours, what percentage of light bulbs have a life less than 2500 hours?
Explain the difference between the null and alternative hypothesis. Which one can be proven in a statistical sense?
Then suppose that a sample of 4000 women had produced the sample mean 275, and again give the 95% confidence interval for the population mean. What can you say about the effect of sample size on confidence intervals?
Compare the margin of error for the interval estimates in parts (a), (b), and (c). The margin of error (Increases or Decreases) as p-bar gets smaller.
The heights of 40 randomly selected people and the heights of their mothers are recorded. Statdisk is used to run a linear correlation and regression analysis. The partial results are provided below:
You're interested in determining the volume of sales dollars necessary for the coming year to reach the break-even point. You've decided to break down the sales for the club into four categories, they are as follows:
Find the test statistic value for testing the equality of proportion variances.
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