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A state agency with a large fleet of cars has ordered 3000 tires from this manufacturer. Assuming the tires are selected at random from among all tires being produced, how many tires in the shipment of 3000 are expected to have a lifetime that is less than 35,000 miles?
What are post hoc comparisons, and why do researchers make them? Why do researchers not use the Bonferroni procedure of procedures for post hoc comparisons?
What can be done to remedy multicollinearity? Use ANOVA instead of Regression.
Is global F ratio significant? Identify this F ratio, and describe whether it is important.Is coefficient for X1 (productivity) significant? How do you know? Mention its t value and accompanying P-value.
A researcher studies the relationship between political attitudes and income. He/she finds that those with higher income are more conservative.
A test indicates the presence of a particular disease 90% of the time when the disease is present and the presence of the disease 2% of the time when the disease is not present.
The mean top of knee height of a sitting mate is 20.7 in.
Formulate a linear programming model for this problem.
Among Americans who are auto racing fans, 59% identify NASCAR as their favorite type of racing. What is the probability that all four have NASCAR as their favorite?
State the alternate hypothesis for this study? What critical value should be used to determine the rejection region? Use the 1 proportion Z-test.
A study was conducted to determine whether magnets were effective in treating pain. The valves represent pain measurements.
Assume a population standard deviation of 450-kilowatt hours. Determine the standard error of the mean.
Given a binomial distribution with n=29 and p=0.83, would the normal distribution provide a reasonable approximation? Why or why not.
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