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a. Suppose that $126,000 is to be allocated for advertising, research, and investment in the ratio 10:4:2. How much money will be allocated for each?
b. Electric Depot sells boxes of high efficiency light bulbs ($8 box) and switch plates ($10 each). In June, total sales were $42000. Customers bought 5 times as many boxes of light bulbs as switch plates. How many of each did Electric Depot sell?
Assume that p-value was 0.07, would you reject null hypothesis of equal mean rates for a Type- I error rate of 5%? (Circle one).
What can you say with 95% confidence about the percent of all American adults who think that humans developed from earlier species of animals.
Each scenario involves randomly selecting n i observations from four, independent, Normal populations as described.
Based on data from a car bumper sticker study, when a car is randomly selected, the number of bumber stickers and corresponding probabilities are shown below.
A confidence interval increases in width as:
Healthcare issues are receiving much attention in both academic and political arenas. Compute the arithmetic mean age of the uninsured senior citizens to the nearest hundredth of a year.
The primary difference between an ordinal level and inteval level variable is: an ordinal level variable has a meaningful zero point while the inteval level variable has no zero point
Compute the 95% confidence interval for the population proportion of registered voters who favor the slow growth initiative.
Using a spreadsheet, create a table that shows the relationship among the units of heights of people in centimeters, inches and feet in the range of 150cm to 2m. Use increments of 5cm.
A 15-minute Oil and Lube service claims that their average service time is no more than 15 minutes. A random sample of 35 service times was collected, and the sample mean was found to be 16.2 minutes, with a sample standard deviation of 3.5 minute..
A random sample of size 16 is chosen from a population and a 90% confidence interval for the standard deviation will be determined. What value of should be located in the chi-square distribution table?
There're several advantages of using a paired t-test. Since the same subjects are being tested in each of the varying conditions, those subjects serve as their own control.
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