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Every year, 50,000 runners compete in the Peachtree Road Race. They run 10 kilometers (a little over 6 miles). The average finishing time is 52 minutes, with a standard deviation of 9 minutes. Fred and Wilma completed the race in 61 and 48 minutes, respectively. Barney and Betty had finishing times with z-scores of -0.3 and 0.7, respectively.
List the runners in order, starting with the fastest runner and ending with the slowest runner.
What is the? 95% confidence interval for the proportion of all Americans that watch 60? Minutes?
Discuss what the standard deviation means. Use one of the company's historical data sets to calculate the standard deviation of the selected data for the last 5 years.
Correct answerThe "average" amount of error expected in predictions The number of cases that have a non-zero residual The strength of the correlation between X and Y
Is this enough evidence to support Union's position? Use significance level of a = 0.05. You may suppose the mean annual salaries are normally distributed.
What is (are) the mode(s)? Does it make sense to talk about the average for this data? Why or why not?
Compare two simple linear regression models, where Model 1 predicts winning percentage based on Yards Made and Model 2 uses Yards Allowed.
a. Obtain the estimated ridge standardized regression coefficients, variance inflation factors, and R2 for the following biasing constants: c = .000, .005, .01, .02, .03, .04, .05.
Find the probability of drawing a straight flush in poker. A straight flush is 5 in a row in a single suit, but not a royal flush.
Calculate the sample mean and the sample standard deviation to one decimal place using a TI-83+ or TI-84 calculator.
Eighty percent of the time, it takes more than how many minutes to find a parking space? (Round your answer to two decimal places.)
suppose that a particular candidate for public office is in fact favored by 48 of all registered voters in the
The personnel manager of the firm is interested in knowing whether age is a factor in the taking of sick days.
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