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Statistics released by the National Highway Traffic Safety Administration and the National Safety Council show that on an average weekend night, 1 out of every 10 drivers on the road is drunk. If 400 drivers are randomly checked next Saturday night, what is the probability that the number of drunk drivers will be
a) Less than 32?
b) More than 49?
c) At least 35 but less than 47?
Lauren Moore has sold her business for $500,000 and wants to invest in condominium units ( which she intends to rent) and land ( which she will lease to a farmer).
If the variability of the filling machine is reduced to 0.025 ounce, verify that this will lower the required average amount of coffee to 4.050 ounces and yet keep 98 percent of the jars above 4 ounces.
These data represent the ages of drivers and the number of accidents reported for each age group in Pennsylvania for a selected year. Find the equation of the regression line for the given data.
The president of Crooked Arrow National Bank wants to determine whether more than 60% of the banks loans are made to persons residing in Crooked Arrow.
How many different possibilities exist for the set of iced-tea drinks that a given participant will taste? (Show how you calculated your answer.)
Calculate all the first and second order inclusion probabilities and find the value of E[n(a)] in two ways
At the 0.05 significance level, test the claim that the treatment (drug or placebo) is independent of the reaction (whether or not headaches were experienced).
Find a 95% confidence interval for the mean weight of the population of all such runners, assuming that the population standard deviation is o=4.5 kg. Based on the confidence interval, does a test of Ho: u=61.3kg, Ha: u =/ 61.3kg
What descriptive summary measures would you use to present the data. which measure is the best to use and which is the worse and why?
1.below is a normal plot of residuals from a regression. does the plot indicate any problems with the assumption that
A random variable X that has pmf given by p(x) = 1/ (n+1) over the range Rx = {0,1,2,...,n} is said to have a discrete uniform distribution. Find the mean and variance of this distribution.
If you wish to estimate a population mean with a sampling distribution error SE = 0.28 using a 95% confidence interval and you know from prior sampling that sigma^2 is approximately equal to 5.4, how many observations would have to be included in ..
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