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Sales at a fast-food restaurant average $6,000 per day. The restaurant decided to introduce an advertising campaign to increase daily sales. In order to determine the effectiveness of the advertising campaign a sample of 49 days of sales were taken. They found that the average daily sales were $6,300. From past history, the restaurant knew that it's population standard deviation is about $1,000. If the level of significance is 0.01, have sales increased as a result of the advertising campaign.
The standard deviation was 12 minutes. Using Chebysheff's theorem, determine at least how many runners had a running time between 53 minutes and 89 minutes?
Explain how popular culture has "no fixed forms". What does this mean? Given the problematic nature of studying popular culture
Refer to the Additional News Source accompanying News Story 10 on the CD, "‘Keeping the faith' UC Berkeley researchers links weekly church attendance to longer.
Understandably, the movie industry would like to know what makes a movie successful. Data from 120 first-run movies released in 2005 suggest that longer movies actually make less profit.
A student is taking a 10 question multiple choice quiz. There are four possible answers to each question. The student decides to guess at random on all 10 questions.
a. suppose x has a poisson distribution with parameter ?11.44. find the following.i. the mean of x.ii. the standard
Define reliability in a way that would be appropriate for the decision. Do you need to consider risk? c How might your friend go about establishing a marginal rate of substitution between reliability and price?
Sick cars. Twenty percent of cars that are inspected have faulty pollution control systems. The cost of repairing a pollution control system exceeds $100.
Ms Lisa is the budget director for the New Process Company. She would like to compare the daily travel expenses for the sales staff and the audit staff. She collected the following sample info:
Assuming normal populations with equal standard deviations, and using the 0.10 level, is there a significant difference between the two routes?
a linear regression was done to relate systolic blood pressure to weight measured in pounds. the resulting regression
?a) What is the probability that the state will not be hit by any major hurricanes in a single? year?
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