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A recently installed assembly line has problems with intermittent breakdowns. Recently, it seems that the equipment fails at some point during 15% of the eight-hour shifts that the plant operates. Each day contains three consecutive shifts. State your assumptions. What is the probability that the assembly line
(a) works fine throughout the three shifts on Monday?
(b) works fine on Monday but breaks down during the first shift on Tuesday?
(c) breaks down on a given day?
(d) breaks down during only one shift during a chosen day?
an instructor is interested in checking whether attending labs improves students performance on their finals. the
Determine the confidence interval for population mean and the Superintendent wants to determine the average amount of hours per week the student population studies at home.
At the 0.05 level of significance, is there evidence to suggest that the population mean waiting time to check out is less than 10.73 minutes?
Find the z-score boundaries that separate a normal distribution as described in each of the following: the middle 20% from the 80% n the tails.
Write the stems again, and rearrange the leaves in increasing order out from each stem. We are interested in the distribution of the data? What would be appropriate to display this?
A function sometimes associated with a continuous nonnegative random variable is the failure rate (or hazard rate) function which is defined as:
Calculate P value? Calculate critical value?
Set up the null and alternative hypotheses, and perform the hypothesis test with a significance level of 0.05.
To estimate the average time it takes to assemble a certain computer component, the industrial engineer at an electronic firm timed 40 technicians in the performance of this task, getting a mean of 12.73 minutes and a standard deviation of 2.06 mi..
Select three situations in psychology where you, the research psychologist, would be concerned about effect size in your research endeavor.
an index of two store items for 2007 based on 2004 is to be constructed. the information for the prices and quantities
A corporate executive reports the re- sults of an employee satisfaction survey, stating that 52% of employees say they are either "satisfied" or "extremely satisfied" with their jobs, and then says "the margin of error is plus or minus 4%." Explai..
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