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You need to estimate the mean number of travel days per year for outside salespeople. The mean of a small pilot study was 150 days, with a standard deviation of 42 days.
If you must estimate the population mean within 10 days, how many outside salespeople should you sample? Use the 90 percent confidence level.
Can you think of an example where regression analysis can be used? How is regression analysis being used in a retail environment, or how should it be used?
Using symbols mention null hypothesis and alternative hypothesis.
Call centers typically have high turnover. The director of human resources for a large bank has compiled data on about 70 former employees at one of the bank's call centers in the Excel file Call Center Data.
Your mayor just announced that the local unemployment rate dropped last month from the prior month. It went from 10.5% to 10.4%. Is this a significant drop? Explain.
Letting μ be the mean composite satisfaction rating for the gaming console, we find that the test should be H o : μ ≤ 42 versus H a : μ > 42
When is regression used? What are the assumptions of Linear Regression? What is correlation? How does it differ from regression? What is the interpretation of the correlation coefficient?
Entrepreneurship researchers are interested in the relationship between entrepreneurial behaviour of firms, such as innovation or new business venturing, and performance indicators, such as sales growth or profitability.
From her district, consisting of several hundred stores, she selects a random sample of 30 stores. For each store she gathered the following information.
Write a paragraph summarizing the results of the analysis and determine whether the calculated values of chi-square are statistically significant
Find out correlation coefficient r, If student take 35 minutes to complete exam, what is his predicted score.
Find the most powerful predictor among the six independent variables using regression.
What is the underlying variable that indirectly correlates these 2 variables? What other variables could you identify as having an indirect relationship?
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