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An insurance representative wants to determine if the proportions of women and men who buy the different policy types are the same. The actual sales results for 50 women and 50 men are
Policy A Policy B
Women 18 32
Men 12 38
Under the null hypothesis, what is the expected number of men who would buy Policy B?
A) 50
B) 25
C) 30
D) 35
A library checks out an average of 250 books per day, with a standard deviation of 75 books. If a sample of 36 days of operation is selected and the sample mean is computed,
Commonwealth Edison wants to identify its heaviest users, which are those that are in the top 6% of electric consumption. How many kilowatt hours in January would qualify for the heavy user classification?
Processing an order for more disks cost $15. Zip uses 60000 disks annually, and the company has a 25% cost of capital. (a) Find the optimal order quantity.
Determine the probability that Mary obtains exactly one Head.
A company ships computer components in boxes that contain 20 iteams. Assume the probability of a defective component is .4. use the geometric distribution to find the probability that the first defect is found in the third or fourth component test..
Utilizing the .05 level, do the results support the psychologists' theory. A psychologist theorized where people can hear better when they have just eaten a large meal.
CASE STUDY: Are the Fish Safe to Eat? Assessing which Factors affect Mercury Levels in Fish in Maine Lakes.
A fair die is rolled nine times. What is the probability that an odd number (1,3 or 5) will occur less than 3 times?
a. Is there evidence the mean amount is different from 1.0 gallon (alpha= 0.01)? b. Compute the p-value and interpret its meaning. c. construct a 99% confidence interval estimate of the population mean amount of paint.
The owner of a local golf course wanted to determine the average age of the golfers that played on the course. In a random sample of 30 golfers that visited his course, the sample mean was 48.34 and the standard deviation was 9.327. Calculate a 90..
You are the manager of a softball league in the locality in which there are 5 local teams with 10 people each. The league has been arranged for parity so that each local team has 5 good players and 5 bad players.
Assume that a 2005 poll of 1000 American voters found that 76% of Republicans favored ending the tax on dividend income, as did 42% of Democrats and 54% of Independents.
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