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A life testing plan is to be terminated after the eighth failure. It should reject a lot that has an acceptable mean life of 900 hours with a probability of 0.10. Items that fail during the test are not replaced.
A sample of 15 items is placed on test with the eight failures occurring at the following times (in hours): 400, 430, 435, 460, 460, 490, 520, 530. Based on Handbook H-108, should the lot be accepted?
A random sample of 100 people reveals that the sample average is 3.2 and the sample standard deviation is 2.1. Construct a 95% confidence interval for the population average.
Conduct a one-way ANOVA to investigate the relationship between hair color and social extroversion.
An economics professor gives her students an exam. The exam scores have a mean of 75 and a standard deviation of 9. How would the value of the standard deviation change if the professor added 5 points to each students exam score?
Test the hypothesis that the annual incomes of corporate trainers in areas of more than 500,000 are significantly more than those in areas of less than 100,000.
During the month, the actual total variable manufacturing overhead was $48,970 and the actual total fixed manufacturing overhead was $43,000. The actual level of activity for the period was 8,300 MHs. What was the fixed overhead budget variance fo..
suppose that the distribution of net typing rate in words per minute wpm for experienced typists can be approximated by
The article "Thrillers" (Newsweek, April 22, 1985) stated, "Surveys tell us that more than half of America's college graduates are avid readers of mystery novels." Let p denote the actual proportion of college graduates who are avid readers of myster..
Using any present or past job related data, perform an ANOVA in either Excel or MegaStat. Write your null and alternate hypothesis. Post your ANOVA table. Interpret the results.
Hardluck Harry has a batting average of .200 (i.e., a 20 percent chance of a hit each time he's at bat). Scouts for a rival baseball club secretly observe Harry's performance in 12 random times at bat. What is the probability that Harry will get at l..
the piron software company currently develops marketing software for primarily service-based organizations. they are
In the last municipal election, a sample of 350 registered voters showed that 85 voted for the incumbants. Find out a 98% confidence interval estimate for the proportion of all voters voting for the incumbants.
In the year 2000, the state of Indiana began a $40-million renovation of its state fairgrounds, which included the building of a miniature golf course and a state-of-the-art livestock building.
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