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1.The following random sample was selected from a normal distribution: 4, 6, 3, 5, 9, 3.It would be useful to draw the normal curve to illustrate the confidence intervala.Construct a 90% confidence interval for the population mean.b.Construct a 95% confidence interval for the population mean.c.Construct a 99% confidence interval for the population mean.00.d.Assume that the sample mean x and sample standard deviation s remain exactly the same as those you just calculated but that they are based on a sample of n = 25observations rather than n = 6 observations. Repeat parts a-c. What is the effect ofincreasing the sample size on the width of the confidence intervals?
The results of Computerworld's annual job satisfaction survey showed that 28% of IS managers were very satisfied with their job. 46%= somewhat satisfied, 12% neither satisfied or dissatisfied, 10% dissatisfied, and 4% very dissatisfied.
The length of time x to complete a particular college entrance
Use data from all networks, not just CBC movies and how well does this regression analysis explain the ratings?
The Mann-Whitney test, or none of these tests?
A population proportion is to be estimated. Estimated the minimum sample size needed to achieve a margin of error E=0.01 with a 95% degree of confidence.
Describes the theory the researchers explore
a screening test for a newly discovered disease is being evaluated. in order to determine the effectiveness of the new
Find the Expected Value of Marketing - the marketing manager at Cooke Collectibles has analyzed the possible demand levels
Examine pairs of variables, using the method of linear regression, to determine if there is any correlation between the variables. Afterwards, you will postulate whether this correlation reveals a causal relationship.
The variance of each of the following sets of scores
Estimate Carl's performance on the new machine.
The College Board finds that the distribution of students
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