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1. In the previous problem, the time that it takes the airbag to completely ?ll up from the moment of activation has an exponential distribution with mean 1 second. What is the probability that the airbag will ?ll up in less than 1/2 second?
2. The time interval between two successive customers entering a store in a mall is exponentially distributed with a mean of 6.55 seconds.
a. What is the probability that the time interval is more than 10 seconds?
b. What is the probability that the time interval is between 10 and 20 seconds?
c. On a particular day a security camera is installed. Using an entry sensor, the camera takes pictures of every customer entering the shop. It needs 0.75 second after a picture is taken to get ready for the next picture. What is the probability that the camera will miss an entering customer?
d. How quick should the camera be if the store owner wants to photograph at least 95% of entering customers?
a multiple-choice test has 30 questions and each one has five possible answers of which one is correct. if all answers
the sample revealed a sample mean of 11.7 ounces with a standard deviation of .8 ounces test to see if the population mean is at least 12 ounces using the .05 level of significance.
The company offers a warranty. The warranty costs $8 per tire returned. If the company sets the warranty miles at 67000, how much on average per tire will the warranty cost?
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visit the australian bureau of statistics website and get the catalogue 6302.0 average weekly earnings australia. you
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Carry out a Z test using the five steps hypothesis testing with a two-tailed test at the .05 significance level, and make a drawing of the distributions involved.
question a researcher conducted and experiment on the effects of a new drug on depression. the researcher had a
a) Under what circumstances can z be greater than one? b) Under what circumstances can a probability be greater than one?
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Identify this F ratio. What does the F ratio tell you about the fit of the regression equation to the sample points? What does it suggest?
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