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Sally wanted to build a multiple regression model based on advertising expenditures and A coffee business price index. Based on the selection of all normal values she obtained the following:
1. Multiple R = 0.738 2. R square=0.546
By using lagged values she came up with the following:
3.Multiple R=0.755 4. R square=0.570
Explain the differences in using these different methods. How could the Coffee business further optimize this model.
Tourism is one consideration for The coffee future. A survey of 1,233 visitors to India last year revealed that 110 visited a small cafe during thei visit. Sally clains that 10%of tourists will include a visit to a cafe. Use a 0.05significance level to her claim. Would it be wise for her to use that claim in trying to convince mangement to increase ther advertising spending to travel agents? Explain.
Finally, what additional strategy (or varied) would she reccommend to the key decision maker to solve the challenge. Prepare a 350 word memo to the key decision maker advocating this reccommendation.
A random sample of 50 engineers of a large technology company that the sample mean is 34.4 year. assume that the population standard deviation is 8 years.
What information is provided by the sign (= or -) of the Pearson correlation? What information is provided by numerical value of the Pearson correlation?
Find the 90%, 95% and 99% confidence intervals for the proportion of all voters who favor the issue. How many more voters should we include in the sample if we need to reduce the margin of error by half?
Compute test statistic for sample data that you would use to test whether sample mean varies from population mean of 10 pounds at a 5 percent level of significance in two-tailed test.
Downs and Abwender (2002) found neurological deficits in soccer players who are routinely hit on the head with soccer balls compared to swimmers, who are also athletes but who are not regularly hit in the head. Is this an example of an experimenta..
Create a research question for one of the following groups: students, children or women. Include the independent and dependent variables you would study, an explanation of whether a one or two-tail test is most appropriate
By using the normal probability distribution, what is the probability the car will be repaired in 35 minutes or less?
In a randomized clinical trial of timolol vs. placebo in patients surviving acute myocardial infarction, the total deaths at an average of 24 months after treatment were found to be 65 out of 720 in the Timolol group and 112 out of 860 in the plac..
The researchers planned to use simple linear regression to see if the age at which a baby was first able to crawl could be predicted from the average outdoor temperature six months after each baby's birthdate.
Determine the following areas under standard Normal distribution curve.
The times it takes workers to complete a task at a certain assembly plant are normally distributed with mean = 10 minutes and standard deviation = 2 minutes.
You're designing a survey to assess employee satisfaction. Provide a question that will produce: Develop five demographic questions to measure gender, age, years of experience, level of education, and ethnicity.
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