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The university policy department must write, on average, five tickets per day to keep department revenues at budgeted levels. Suppose the number of tickets written per day follows a Poisson distribution with mean of 6.0 tickets per day. Find the probability that exactly six tickets are written on a randomly selected day from this distribution.
a) .160
b) .446
c) .606
d) 0
A nutritionist wants to estimate the mean amount of cholesterol in a certain variety of chicken eggs. She wants to be within 14 mg. with 99% confidence.
Can we conclude that the mean time for a game is less than 3.50 hours? Use the .05 significance level.
A population is normally distributed with the mean of 100 and a standard deviation of Would it be unusual for mean of sample of 3 to be 115 or more? Why or why not?
Critically discuss the difference between the standard deviation of the sampling distribution of the mean and the standard deviation of the sampling distribution of the median when we calculate the probability?
Among the half that had surgery, 80% showed improvement after three months, but only 54% of those who used the wrist splints improved. what's the standard error of the difference in the two proportions?
A company has just manufactured 1694 CDs and 376 are defective. If 9 of these CDs are randomly selected for testing, what is the probablity that the entire batch will be accepted?
Ace Jack had no idea whether the $100,000 he pays for training for his used car salespeople works.
What is the probability that between 133 and 171 of the business travelers say that the reason for their most recent business trip was an internal company visit?
Do the data demonstrate that the true mean photometer reading for the color density is significantly different from 12 at 3 percent level of significance?
What is the mean and standard deviation of the sampling distribution of x-bar assuming that mean =20 and standard deviation equals the square root of 20?
Determine mean and standard deviation for number of erroneous returns per batch.
Should Katie conduct a between-subject ANOVA or a within-subject ANOVA? Describe your answer.
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