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The probability using the normal distribution. Environmental Protection Agency (EPA) fuel economy estimates for automobile models tested recently predicted a mean of 24.80 mpg and a standard deviation of 6.2mpg for highway driving. Assume that a normal model can be applied.
(a) Draw the model for auto fuel economy. Clearly label it, showing what the 68-95-99.7 Rule predicts about miles per gallon.
(b) In what interval would you expect the central 68 percent of autos to be found?
(c) About what percent of autos should get more than 31 mpg?
(d) About what percent of cars should get between 31 and 37 mpg?
(e) Illustrate the gas mileage of the worst 2.5% of all cars.
Given length an athlete throws a hammer is a normal random variable with mean 50 feet and standard deviation five feet, what is the probability he throws it: Between 50 feet and 60 feet.
How large should n be so that a 90% confidence interval for µ has a margin of error and What is the P-value for a test of the hypotheses
If 1 man aged 18-24 is arbitrarily chosen, determine the probability that his serum cholesterol level is between 165 and 200.
Assume the population standard deviation is 1.2 hours. The standard error of the mean is:
Any value which is based on having measured a sample is called:
The Kruskal-Wallis rank test is a nonparametric replacement - The Wilcoxon rank sum test tests a null hypothesis
This model is fit to the data using the method of least squares using statistical software, and the following parameter estimates and their standard errors are obtained.
Modify above problem (Problem 8th) so that each hardware vendor now demands seventy-five (75) units. Any units available from the vendors that are not shipped cost nothing.)
write down the hypothesis the test used the p-value and the interpretation then hand calculates a 95% CL for the odds ratio estimate on this last test.
At the .05 significance level, can we conclude that the guideline is still reasonable?
What kind of statistical test best did you use?
You play a game with two possible outcomes. Outcome A has probability 0.4 and outcome B has probability 0.6. When B occurs you win $2.00; otherwise, you lose $1.00. What is your expected value for this game?
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