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Usually statisticians use an alpha level of either 0.01 or 0.05 or 0.10. Describe what a statistician is trying to avoid by setting the alpha level to be a small number.
a mean guy gave you a nice sample from normal distribution with known variance. so the test should be easy. but he
you were interested in how long the average psychology major at your college studies per night so you asked 10
Take pM and pF to be the proportions of all college males and females who worked last summer. We conjectured before seeing the data that men are more likely to work. The hypotheses to be tested are?
determine the sample proportions.bdecide whether using the two-proportions z-procedures is appropriate.if soalso do
Part 1. What is the appropriate distribution for such data? Part 2. Is this lot anomalous?
Of 900 consumers surveyed, 414 said they were very enthusiastic about a new home decor scheme. What is the 99% confidence interval for the population proportion?
a researcher wishes to determine whether happiness and marital status are dependent from one another. the table below
The 99% confidence interval using a t-distribution is ( ), ( ). Round to one decimal place as needed
Following data represent random sample of bank balances for population of checking account customers at large eastern bank. Based on data, determine the 95 percent confidence interval estimate for true population mean?
Obtain the Normal Equivalent Deviates corresponding to the observed values of X and use these to produce a Q-Q plot. Does your plot indicate that these data are consistent with coming from a Normal distribution?
Suppose a recent poll of 1,000 people sets forth that 51% of Americans support the U.S. government's "War on Drugs." This poll is shown to have a margin of error of 2%.
the name of each contestant is written on a separate card the cards are placed in a bag and three names are picked
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