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Buses arrive at a certain stop every 15 min starting at 7 a.m. A passenger arrives at the stop at a time that is uniformly distributed between 7:00 a.m. and 7:30 a.m. (X refers to the number of minutes past 7 a.m., and X is uniformly distributed over the interval (0, 30)).
a) Find the probability that he waits less than 2 min for a bus.
b) Find the probability that he waits more than 10 min for a bus.
Use the Chi-square test of independence with a .01 level of significance to determine whether appeal is independent from type.
when the background music was slow the mean amount of bar purchases for a sample of 17 restaurant patrons was 30.47
To test the hypothesis that 48% of PC users have never used a Mac, the analyst took a sample of 50 PC customers drawn at random and found that 22 of them had never used a Mac.
Families USA, a monthly magazine that discusses issues related to health and health costs, surveyed 20 of its subscribers. It found that the annual health insurance premiums for a family with coverage through an employer averaged $10,979.
What are the assumptions underlying a normal distribution? What are the assumptions underlying a binomial distribution? Why do we want to assume that our sample data represent a population distribution?
The results of the simple linear regression are provided below.
The mean age of 25 randomly selected college seniors was found to be 23.5 years, and the standard deviation of all college seniors was 1.3 years. Which of the following is the correct symbol for 1.3 years?
Calculate the standard error. With 95% confidence, find out the margin of error?
Is this adage correct for baseball? Out of 2425 regular season games in 2002, the home team won 1314 of them. Does the home field advantage apply in baseball?
Failure testing of a steel alloy resulted in the following S-N curve:N=(1.23*10^28)S^-14.85
Suppose we wish to test the null hypothesis that there are no differences among the proportion of men and women who developed a rash. Evaluate the P-value of the chi-square test of this hypothesis.
Does the Southside qualify for the employment assistance program and provide the city council with a recommended course of action based on this result.
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