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Estimating the sample standard deviation using normal score.
For a sample with a mean of M = 85, a score of X = 90 corresponds to z = 0.50. What is the sample standard deviation?
New study is to use 90% confidence level. Estimate is to be within 1 percent of population proportion. Determine the essential sample size?
The p-value for a test statistic is .085, what is the minimum level of significance required to reject the null hypothesis?
Testing for population mean - warp-breaking specification of the manufacturer at the .05 level of significance?
If we assume all the possible random samples of 250 students at this university, 95 percent of the samples should have means among what two numbers.
Determine percent of the garages take between 29 hours and 34 hours to erect? Determine percent of garages take 28.7 hours or less to erect?
The 50 members of the placebo group had blood pressure lowered by an average of 15 points with standard deviation 8 points. To analyze this information we will use a, When testing whether or not the increases in spending are different, the test is ..
What is the probability that of the last 100 new juvenile delinquents put on probation, 30 or more will commit another crime?
The point estimate for the difference between the proportions is:
would this prove that they are exceeding their goal, using α = .025?
If there are 5 choices for a question and there is a 50% chance that the student knows the answer, what is the probability that the student knew the answer to a question he correctly answered?
Illustrate that probability distribution of X satisfies properties of a discrete probability distribution.
Identify Independent and Dependent variable being investigated. Formulate the hypothesis statement regarding your research issue.
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