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Assume that the population of heights of male college students is approximately normally distributed with mean m of 68 inches and standard deviation s of 3.75 inches. A random sample of 16 heights is obtained.
Find the mean and standard error of the xbar distribution.
Find P (xbar > 70)
Find P ( xbar < 67)
know that I am working with sampling distributions of sample means.
The original simple form of the Connecticut state lottery (ignoring a few gimmicks) awarded the following prizes for each 100,000 tickets sold. The winners were chosen by drawing tickets at random. If you hold one ticket in this lottery, what is y..
Over the past decade, there has been a strong positive correlation between teachers salaries and prescription drug cost.
Assume a restaurant business succeeds 60% of the time. Suppose that there are three such restaurants open in your city. When they don't compete with one another
What is an appropriate sample space for this experiment?
Do 1-sample t-test to see if people in Chicago have travelled to fewer states than people nationwide. Utilize the 10% (.10) level of significance.
For a population containing N=902 individuals, what code number would you assign for:
You are presented a 90% confidence interval for the difference in population mean scores (with drug - without drug) of (-17.81, -7.24). What can you conclude from this interval?
Get a test statistic and p -value. Interpret results at α = .01.
Explain how one extreme score influences mean and standard deviation.
There were 23 people at my last Arachnophobics (fear of spiders) Anonymous' Halloween party. As a gag fake spiders were put into the gift boxes to be handed out when people came in.
Schlepsi has contracted with AluminiCorp to produce special beverage cans for an upcoming promotion. They want 25% of the Schlepsi cans produced by AluminiCorp to be imprinted with the phrase 'A Winner is You!' along with a promotion code for the ..
The number of degrees of freedom corresponding to between treatments is:
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