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Question: MP-3 players, and most notably the Apple iPod, have become an industry standard for people who want to have access to their favorite music and videos in a portable format. The iPod can store massive numbers of songs and videos with its 120-GB hard drive. Although owners of the iPod have the potential to store lots of data, a recent study showed that the actual disk storage being used is normally distributed with a mean equal to 1.95 GB and a standard deviation of 0.48 GB. Suppose a competitor to Apple is thinking of entering the market with a low-cost iPod clone that has only 1.0 GB of storage. The marketing slogan will be "Why Pay for Storage Capacity that You Don't Need?" Based on the data from the study of iPod owners, what percentage of owners, based on their current usage, would have enough capacity with the new 1-GB player?
A high-school department made a change in its curriculum. What are the results of the test (do the data indicate that the new program results in a lowering of math skills). Should the department us the new curriculum and why
At alpha = 0.05, test to see if the coefficient of x1 is significantly different from zero. Determine the multiple coefficient of determination.
Determine percentage of employees has 5 dependents? Of all employees which have at least one dependent, determine percentage has more than one?
you have obtained the number of years of education from one random sample of 38 police officers from city a and the
A transportation company wants to estimate the average length of time goods are in transit across the country. A random sample of 20 shipments gives x = 2.6 days and s = 0.4 day. Give a 99% con?dence interval for the average transit time.
suppose that 40 percent of the voters in a particular region support a candidate. find the probability that a sample of
Bruce Kuhlman, owner of Kuhlman Farms, wishes to use brand of fertilizer which will produce maximum yield per acre of wheat. Mr. Kuhlman can select from four different commercial brands. Write down the hypotheses?
From her district, consisting of several hundred stores, she selects a random sample of 30 stores. For each store she gathered the following information.
for a small sample difference of means test where n1 12 and n2 16 and we can assume the population variances are
Here is data on per capita consumption (in pounds) of mozzarella cheese in the US and the number of Ph.Ds in civil engineering awarded in the US for the years 2000 - 2009.
• Customer service (Oracle, Amazon, Dell, Sage) Start with www.searchcrm.com and www.customerthink.com (to ask questions about CRM solutions). Have each group present arguments to convince the class members to use the product(s) the group investig..
a. What is the mean of the sampling distribution?
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