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The MacBurger restaurant chain claims that the waiting time of customers for service is normally distributed, with a mean of 3 minutes and a standard deviation of 1 minute. The quality-assurance department found in a sample of 50 customers at the Warren Road MacBurger that the mean waiting time was 2.75 minutes. When you perform a test of hypothesis, what would be the resulting p-value?
1.on november 26 1995 the minneapolis tribune ran an article on gender differences in shopping behavior. when 400 women
What is the slope of the least-squares regression line of final-exam scores on pre-exam total scores in this course? (Use 2 decimal places.)
You have been research for your statistics class on how nervous the American adults are in general, you have decided to use HINTS 2007 data set that has a scale (going from 0 to 24)measuring the psychological distress of the respondents.
In the Arnold's Muffler example for the exponential distribution, the average rate of service was given as 3 per hour, and the times were ex-pressed in hours.
an office meeting consists of 4 managers and 7 staffa each working team consists of one manager and at least 1 but not
What is the probability that the individual is a male - are enjoying shopping for clothing and the gender of the individual statistically independent? Explain.
Flu cases this past fly season in the Central City school system were about 15 per week. For the entire state, the weekly average is 16 and the standard deviation, 2.35. Are the kids in Central City as sick as the kids throughout the state?
An exterminator claims that no more than 10% of the homes he treats have termite problems within 1 year after treatment. In a sample of 100 homes, local officials find that 14 had termites less than 1 year after being treated. At the 0.05 level of..
use technology to construct the confidence intervals for the population variance ?2 and the population standard
Let P(X) _ .55 and P(Y) _ .35. Assume the probability that they both occur is .20. What is the probability of either X or Y occurring? Suppose P(X1) = .75 and P(Y2|X1) = .40. What is the joint probability of X1 and Y2?
What is the mean, variance & standard deviation of contract award amount (in millions of dollars)?
1. in a random sample of 5 parts on an assembly line the probability that one of the parts is defect is 15 and follows
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