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A tire company tested a particular model of super radial tire and found the tires to be normally distributed with respect to wear. The "average" (mean) tire wore out at 41,000 miles, and the standard deviation was 4000 miles. Approximately what percent of the tires are likely to wear out before 40,200 miles?
Perform the appropriate test for a difference in mean blood glucose and report the p-value for the two-tailed test of significance, assuming that the variances are equal.
Consider the following properties of real numbers: Commutative Property of Addition [6] Commutative Property of Multiplication
Write down the name of 4 parts of the regression equation.
Plot Kaplan-Meier Survival curve estimates along with true survival curve for n=25,100,1000
After testing whether social class and welfare spending were related, you derive a chi-square (obtained) of 17.64, with 6 degrees of freedom. If alpha is set at 0.01, what is your conclusion and interpretation?
To exercise your skills, you are to perform the following using different tools available to you (e.g. Excel spreadsheet, graphing calculator, etc.) and write and explanation on your findings:
Using the results, describe the effect of an outlier or extreme value on the confidence interval.
You randomly select six women and ask each if she considers herself a fan of professional baseball. Construct a binomial distribution using n=6 and p=0.39.
If student is chosen at random, determine the probability that he or she is sophomore and owns a credit card.
Determine the expected value and standard error of the sum of 400 draws?
In certain normal distribution of scores, mean is 50 and standard deviation is 4. Determine z-score corresponding to a score of 55.
A farmer has 40m of fencing with which to enclose a rectangular pen.Given that the pen is x m wide - show that it's area is (20x - x^2)m^2 and deduce that the maximum area that he can enclose (Answer given 100m^2).
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