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As reported by Runner's World magazine, the times of the finishers in the New York City 10-km run are normally distributed with a mean of 61 minutes and a standard deviation of 9 minutes. Let x be the finishing time for a finisher in the New York 10-km run.
a) What is the chance that finishers complete the run with the times between 50 and 70 minutes?
b) What is the chance that finishers complete the run with the times more than 75 minutes?
c) How fast would finishers have to complete the run among the top 5% finishers?
On average, 70 percent of the passengers on a flight from San Francisco to Boston prefer chicken to fish. Assume that the passengers have only one of two choices, chicken or fish for their meal. If there are 200 passengers on a flight and the airline carries 140 chickens and 60 fish dinners, what is the probability that more than five passengers will be disappointed?
At the 5% level of significance, can we infer that the population mean weight of athletic men is lower than the population mean weight of non-athletic men by more than 2 pounds?
A bag of jelly belly candies contains the following colored jelly beans: red (10), blue (2), orange (5), brown (21), green (0), and yellow (18). Construct the probability distribution for x.
Consider the following data values of variables x and y. The equation of the least-squares regression line for this data is
Sample mean varies from population mean of 10 pounds at 5 percent level of significance using two-tailed test. Compute test statistic for the sample data.
The mean income of a group of sample observations is $500; the standard deviation is $40. According to Chebyshev's theorem, at least what percent of the incomes will lie between $400 and $600?
Using the .05 level of significance, what should we conclude about the theory that 24 hours is the natural cycle? (That is, does the average cycle length under these conditions differ significantly from 24 hours?)
Form the column of differences and find the mean and standard deviation of this column of numbers.
Determine which is the dependent variable Y and which is the independent variable X. Explain your reasoning. Draw a scatterplot and indicate the relationship if any. Explain. Compute the least-squares regression equation. Show major line items of you..
You will be graded on accuracy, completeness (addressing each point above), and effectiveness (utility, ease of reading).
A computer password consists of four characters. The characters can be one of the 26 letters of the alphabet. Each character may be used more than once. How many different passwords are possible?
Simulate both one-and two-teller systems, calculate waiting time, average queue length, and percentage utilization for each system.
Ace Jack had no idea whether the $100,000 he pays for training for his used car salespeople works.
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