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The histograms of some sampling distributions are symmetrical. T-F What would make a histogram symmetrical, and give an example of a symmetrical distribution? A random sample of size 36 is to be selected from a population that has a mean μ = 50 and a standard deviation σ of 10.
Find the standard (z) score for a sample value of 40.
A sample proportion is calculated from a sample size of 394. How large of a sample would we need in order to decrease the standard error by a factor of 9?
The following estimated regression model was developed relating yearly income (Y in $1,000s) of 30 individuals with their age (X 1 ) and their gender (X 2 ) (0 if male and 1 if female).
Devise a method for estimating and plotting Bayesian credible regions for the paramters, using your MCMC sample and compute LS estimators of a and b,
Develop a 90 percent confidence interval for the proportion opposing health care changes. (Round your answers to 4 decimal places.)
Use the binomial distribution formula to calculate the probability that a) out of 5 adults, none is concerned that employers are monitoring phone calls.
What would you recommend Taylor do to cut back its labor cost? (Illustrate using an ABC plan.)
The number of standard errors that the sample estimate (p 1 - p 2 ) of (p1 - p2) falls from its null hypothesis value of zero is called
If the player does not win or lose on his second roll he continues to roll, using the same criteria given for the second roll.
State in each of given cases whether you would expect relationship between given variables to be positive or negative or neither.
what is the sampling distribution model of the percent passing developmental courses for your campus in Fall 2009 and provide the percentages between which we would expect to see 68% of the sampling distribution, 95% of the sampling distribution
At the .05 significance level, is there a difference in the mean number of calls per day between the two employees?
Compute the within group variability. Do you require any post hoc testing? Why or why not? Decribe in detail.
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