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A company wants to find the average weight of its products. A large initial sample shows the standard deviation of the weight is 20 g. What sample size would give a 95% confidence interval for the population that is (a) 10 g wide, (b) 8 g wide, (c) 5 g wide?
Normal distribution with a mean of 240 minutes and a standard deviation of 40 minutes, what is the probability of a procedure of this type lasting less than 200 minutes?
Based on p=.60, probability that a randomly selected homeowners will say no to newspaper subscription.
Find the z score corresponding to a score of X = 60 for each of the following distributions:
Compute the correlation and sample covariance. Compute the sample covariance and the sample correlation. Intuitively, what kind of correlation.
Discuss the main assumption for using a chi-square test. Find a research article that uses chi-square and explain why it was the right test and how the assumption plays into it.
Nationwide, the average waiting time until electric utility customer service representative answers a call is 300 seconds per call. The Gigantic Kilowatt Energy Company took a sample of 35 calls and found that, on the average
Calculate the Mean, Median, Mode, Range and Standard deviation of this sample. Show Calculations: Use any calculation method desired
a) How is it possible that the minimum of the 365 values is 0 inches and the median is also 0 inches? b) Describe the distribution as symmetric, left-skewed or right-skewed.
By using the 0.10 level of significance, is there evidence that the population mean is above the $300?
During the 2003 season, MLB took steps to speed up the play of baseball games in order to maintain fan interest; the following results come from a sample of 60 games played during the summer of 2002. And a sample of 50 games played during the summ..
a prestigious university requires a score of at least 750 on a graduate exam for admission to its mba program. suppose
question your company sells exercise clothing and equipment on the internet. to design the clothing you collect data
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