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The U.S. adult population by age is as follows (The World Almanac, 2009). The data are in millions of people. Age Number 18 to 24 29.8 25 to 34 40.0 35 to 44 43.4 45 to 54 43.9 55 to 64 32.7 65 and over 37.8 Assume that a person will be randomly chosen from this population.
a. What is the probability the person is 18 to 24 years old?
b. What is the probability the person is 18 to 34 years old?
c. What is the probability the person is 45 or older?
What is the probability that the sample mean will be at least 1000? Do you need to use the central limit theorism to answer this question? explain.
Determine the sum of these probabilities , and why is the number less than 1
Find the probability that number of college students who say they use credit cards because of there wards program is (a) exactly two, (b) more than two.
Let x denote the total number of steps required to do the analysis (both procedures). Show the value of the random variable for each of the experimental outcomes.
If the employees in this outlet has a mean of age as with variance between their ages as. Find the mean and the standard deviation of the age of employees of a fast-food in another outlet (Y).
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.
A study reported in "Inside Higher Education News" (May, 2006) found that financial incentives can improve low-income college students' grades and retention.
In business, investors are always interested in the tradeoff between returns and risk. Regression analysis is a statistical technique that can be used to quantify this risk.
An online book store wants to determine if there is an association between coupon redemption and gender. After a special coupon broadcast to its reward members, the following data on coupon redemption at check out were collected.
Sstandard deviation was found to be 3.3 minutes. Is there evidence to reject the manager's claim at alpha =.02? Perform an appropriate hypothesis test.
Test the claim of the brewery about the mean volume equal to 32 oz. at the 0.05 significance level. It's your choice whether to use z or t.
Develop hypothesis, conduct analyses as you deem necessary, and prepare a page report of your findings. Papers will be evaluated in terms of their accuracy of analysis and interpretation, completeness, and quality of writing.
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