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Q1) A device has a constant failure rate of 0.7 /year.
(a) What is the probability that the device will fail during the second year of operation?
(b) If upon failure the device is immediately replaced, what is the probability that there will be more than one failure in 3 years of operation?
Q2) A servomechanism has an MTBF of 2000 hr. with a constant failure rate.
(a) What is the reliability for a 125-hr mission?
(b) Neglecting repair time, what is the probability that more than one failure will occur during a 125-hr mission?
(c) That more than two failures will occur during a 725-hr mission?
7. Get the passenger car mileage data from http://lib.stat.cmu.edu/DASL/Data?les/carmpgdat.html (a) Fit a multiple linear regression model to predict MPG (miles per gallon) from the other variables. Summarize your analysis.
Suppose there was 2,500 cards in the inventory and how would the results be useful to the owner to estimate the total value of the inventory. What equation is best?
The historical context of England in 1215 with the costs of King Richard the Lionheart's ransom and the crusades. What were the nobles' complaints?
"There is a 50% chance of rain today." Contact a weatherperson and ask him or her what this statement means. Does this explanation agree with yours?
Suppose that you perform a significance test regarding a population mean, and that the evidence does not warrant rejection of the null hypothesis.
q1. both undergraduates and postgraduates can use the university cafeteria. each diner can choose between buying a
Obtain a test statistic and p -value assuming equal variances. Interpret these results.
Discuss the following questions: Of what use is intervention and prevention for this population? What needs to be done in the American justice system to combat crimes committed by the group you have chosen to study?
Do these data lend support to this belief? Perform a significance test to answer this question. Construct and interpret a 95% confidence interval for the difference in proportions.
in one trip of a cruise ship 341 of the 3745 passengers became ill with norovirus. at about the same time 260 of the
when performing an f-test if the means differ significantly the between-group variance will be much larger than
It takes 1.5 hours to make a finished unit, and the expected hourly wage rate is $14 per hour - Prepare a direct labor budget by quarters for the 6 months ending June 30, 2011.
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