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In a manufacturing process a random sample of 36 bolts manufactured has a mean length of 1.71 inches with a standard deviation of .08 inches. What is the 90% confidence interval for the true mean length of the bolt?
From Company B, 850 stereos are purchased and 6% are found to be defective. Given that a stereo is defective, find the probability that it came from Company A.
Suppose there are two samples of size 6 and 7, with a rank sum of 58 in the sample of size 6. Using the Wilcoxon rank-sum test, evaluate the significance of the results, assuming there are no ties.
six individuals including a and b take seats around a circular table in a completely random fashion. suppose the seats
Does thus data support the researchers' hypothesis? Test the relevant hypothesis using a = .1 by first calculating a p-value.
At 0.01 significance level is it sensible to conclude that modification reduced number of traffic accidents?
Use simple exponential smoothing with α = 0.3 to forecast battery sales for February through May. Assume that the forecast for January was for 22 batteries.
ample of fifteen 8 ounce Baby Ruth candy bars are weighed and it is found sample standard deviation is 0.6 ounces. Test company's claim at (alpha sign) is 0.05.
to understand better the effects of exercise and aging on various cirulatory functions a study was done on 16
A local pizza parlor advertises that their average time for delivery of a pizza is within 30 minutes of receipt of the order. To check the accuracy of their claim, the delivery time for a random sample of 64 orders were recorded.
Four research participants take a test of mannual dexterity (high scores mean better dexterity) and anxiety test (high scores mean more anxiety). Scores are as follows:
generate a chart or table that lists a variety of crimes types. your chart should include at least four types of crimes
Could you please tell in what situation the maentl hanszel test is more appropriate than using chi square. I believe maentl hanszel is used when a confounding variable is present thus allowing for adjustment
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