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Using assumed true population means of 2.80, 2.85, 2.90, 2.95, and 3.00 hours, plot the power curve for the test in Exercise.
Exercise A manufacturer of electronic kits has found that the mean time required for novices to assemble its new circuit tester is 3 hours, with a standard deviation of 0.20 hours. A consultant has developed a new instructional booklet intended to reduce the time an inexperienced kit builder will need to assemble the device.
In a test of the effectiveness of the new booklet, 15 novices require a mean of 2.90 hours to complete the job. Assuming the population of times is normally distributed, and using the 0.05 level of significance, should we conclude that the new booklet is effective? Determine and interpret the p-value for the test.
the following data were collected for a test of linear correlation and spearmans rank correlation was used2.2 3.3 3.3
questiona soft drink manufacturer is using a winning cap as a sales promotion. the purchaser can get a prize if they
A company that packages peanuts states that at a maximum 6% of the peanut shells contain no nuts. At random, 300 peanuts were selected and 21 of them were empty.
Arrange these data on an appropriate table, and discuss the association between mortality rate and the use of carbolic acid.
What is the percentage of increase/decrease of sales from 2004 to 2007?Percent change = ?%
calculate the estimate for the standard error of difference between two independent means for s12 13 s22 20 n1 22
If the campus was equally divided between males and females, what are the probabilities of males and females on this campus would be at risk?
a deck of cards is shuffled and you choose one at random observe its colour and replace it in the set. the cars are
As of 12-31-13, G owned several limited-life intangible assets. During 2014, G purchased an unlimited-life intangible asset for $60,000.
suppose that you measure the heights of 20 high school sophomore males. the sample mean is 66.2 inches. suppose that
Determine the probability that number of requests in 10 hour work day is between 68 and 80 inclusive? Give your answer to four decimal places.
A sample of 400 First time home buyers found that the mean of annual household income was $60,000 and the sample standard deviation in income was $14,500. Construct 95% confidence intervals for the population mean annual household income for the f..
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