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An auto manufacturer advertises that "90% of the cars we've ever made are still on the road." Assuming this is literally true, how can it be explained? What facts / statistics would you need to know to expose this misleading claim?
Random sample from population of male runners in town or city. Create and interpret the 95% confidence interval for mean, mean of the population from which sample is drawn.
Develop a decision tree for the case of a company operating at full capacity and with product demand rising. The choice is between new equipment and overtime.
Let X be the number of gallons of ice cream that is requested at a certain store on a hot summer day. Assume that f(x)= 12x(1000-x)^2/10^12, 0
A state education agency designs and administers high school proficiency exams. Historically, time to complete the exam was an average of 120 minutes.
Based on this sample information, create a 90% confidence interval for population mean yearly premium.
Consumer Reports published an article on some sport-utility vehicles they had tested recently. They reported some basic information about each of the vehicles and the results of some tests conducted by their staff.
A medical researcher estimates that no more than 55% of U.S. adults eat breakfast every day. In a random sample of 250 U.S. adults, 56.4% say they eat breakfast every day.
At the .025 significance level, can we conclude that less than 88 percent of the orders are delivered in less than 10 minutes?
Develop a linear regression equation for the given data and forecast how much money Robert will win if he spends $30.
It is suspected that the mean turnover has changed and is not 6.0. Use the .05 significance level. State the null hypothesis and the alternate hypothesis.
How would you find the normal approximation to the binomial probability P(x = 5) in part A? Please show how you would calculate µ and σ in the formula for the normal approximation to the binomial, and show the final formula you would use without g..
What is the p-value and compute a 95% CI for the difference in means between the two groups?
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