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To find the test statistics using chi square method?
A professional bowler has been having trouble 'hitting the pocket' in order to get strikes . His average has been 205 with a standard deviation of 10 pins. If in his next 15 games his standard deviation is 14 -- test the belief that his game is more variable than in the past.
Use area = 0.025
What is the null and alternate hypothesis?
Find critical value and test statistic Use Chi squared method.
The mean maximum oxygen uptake for elite athletes has been found to be 80 with a standard deviation of 8.1. Assume that the distribution is approximately normal.
A small town has a population of 20,000 people. Among these 1,000 regularly visit a popular local bar. A sample of 100 people who visit the bar is surveyed for their annual expenditures in the bar.
Assuming that the Poisson distribution is a plausible model in describing variability of asbestos fiber counts in filters; derive a 95% confidence interval indicating the variability in the average number in asbestos fibers.
The sample size n, the sample means, and the sample standard deviations for the two groups are given
If student is chosen at random, determine the probability that he or she is sophomore and owns a credit card.
In rectangular coordinate system, determine the distance between the points (-4,1) and (8,6).
At the .01 significance level, can we conclude that the 30-yeer mortgage rate for small banks is less than 6 percent? Estimate the p -value.
Four wheel bearings have been replaced on a company car. The mechanic has selected 4 bearings from a large supply bin. The mechanic is unaware that 10 percent of the bearings fail within the first 100 miles.
Develop the management-research question hierarchy that will help you to develop a specific proposal.
Results were analyzed using one -way ANOVA and included SSTR =7 , 102 and SSE = 10 ,511. Are all 8 tapes equally appealing on average? Determine p value?
Determine the mean and standard error of the x - bar distribution.
Construct a 90 percent confidence interval for the proportion of all kernels that would not pop.
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