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Scores on a particular test have a mean of 64.6. The distribution of sample means for samples of size 100 is normal with a mean of 64.6 and a standard deviation of 1.9. Suppose you take a sample of size 100 of test scores and find that the mean is 63. What is the z-score corresponding to this sample mean?
Consider Obama's health care plan. There are = #s of males and females. 50% of the females approve (A) of the plan and 70% of the males do not approve (N) of the plan.
Differentiate between correlation and causation. What are the practical applications? How would it be used in the workplace?
Determine the probability of having more than 3 defects in a roll?
Conduct post hoc comparisons with the LSD method. Which groups differ significantly at α = 0.05?
Find the equation of the regression line for the given data. What is the predicted value of Y when X = -2? What is the predicted value of Y when X = 4?
Compute a 95% confidence interval for the population proportion of positive drug tests. Explain why is the normality assumption not a problem despite the very small value of p.
Form a frequency distribution and a percentage distribution that have class intervals with the upper class limits $99, $119, and so on.
The Price-to-Earnings ratio (P/E) of a publicly listed profit-making company is defined as the ratio of the stock price of the company to the earnings per share.
Each undergraduate course taught cost the college an average of $2,500 in faculty wages, and each graduate courses cost $ 3,000. How many undergraduate and graduate courses should be taught in the fall so that the total faculty salaries are kept t..
Use analysis of variance to test any differences in mean glue strengths.
Multiple choice questions based on multiple regression - Find the coefficient of determination for the above model
What is sampling with replacement, and why it is used?
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