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Explain how the mean of a standard normal distribution is different from the mean of a normal distribution.
Assume the population is normally distributed, the confidence level is 95%, n = 12, and σ is unknown.
A bag contains 10 balls. 3 of the balls are blues 4 are red and the rest are white balls. What is the probability that a student can pick either a blue or a red
Find a newspaper article or Internet report about a study that looks at the relationship between two quantitative variables for a larger population
Construct a 95% confidence interval estimate of the mean SAT scores. Show all work. Just the answer, without supporting work, will receive no credit.
Suppose that an achievement test in mathematics was given to students from two different high schools A and B. When the results of the test were tabulated
How does your sample compare to this theoretical distribution of sample means and what are the mean, variance, and standard deviation of the observations in your sample?
Suppose that lifetimes of light bulbs produced by a certain company are normal random variables with mean 1000 hours and standard
What is the probability that she will be able to complete her exam with a working calculator? Does she really gain much by bringing in the backup calculator?
the time needed to complete a final examination in a particular college course is normally distributed with a mean of
Assume the population mean weight per sheet slips to 9 pounds. Determine the probability that the sample will indicate an adjustment is not needed.
Give a 95% confidence interval for the true proportion of their entire mailing list who may donate.
The McNemar test is a test on a 2x2 classification table when you want to test the difference between paired proportions. Chi-square test for 2X2 tables compares the tallies or counts of categorical responses between two (or more) independent grou..
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