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Question: Suppose speeds of vehicles on a particular stretch of roadway are normally distributed with mean 36.6 mph and standard deviation 1.7 mph.
a. Find the probability that the speed X of a randomly selected vehicle is between 35 and 40 mph.
b. Find the probability that the mean speed X¯ of 20 randomly selected vehicles is between 35 and 40 mph.
suppose that 76 of americans prefer coke to pepsi. a sample of 200 was taken. what is the probability that at least
Draw the Normal model for tree diameters.- What size would you expect the central 95% of all trees to be?- About what percent of the trees should be less than an inch in diameter?
Plot the sales data as a time series and do you think this series is stationary or nonstationary
a an electrical noise voltage is shown to be gaussian with a mean of zero and a variance of 1 volts squared. what is
What have you learned about statistics? In developing your responses, consider - at a minimum - and discuss the application of each of the course elements in analyzing and making decisions about data (counts and/or measurements).
suppose the counselor found the sum of squared deviations from the mean of the sample to be 135. given that he tested
Distribution and the method of moments estimators of the parameters are alpha(hat)= 5.23 and lambda(hat) = 21.3. Find an asymptotic 95% confidence interval for alpha.
Mighty Manufacturing must decide on the processes to use to produce 1650 units. If machine 1 is used, its production will be between 300 and 1500 units. Machine 2 or machine 3 can be used only if machine 1's production is at least 1000 units. Ma..
Let x represent the hemoglobin count (HC) in grams per 100 milliliters of whole blood. The distribution for HC is approximately normal with μ = 14 for healthy adult women. Suppose that a female patient has taken 10 laboratory blood samples in the ..
What is the average rating for all CBC movies? How about ABN movies and BBS movies - Create a line graph of the monthly average ratings for CBC for the year. Note that there are multiple ratings data for the months
Explain whether the figure of 46% is based on personal probability, long-run relative frequency, physical assumptions about the world, or some combination.
lifetimes of computer memory chips have gamma distribution with mean mu4 years and variance sigma2163 years. what is
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