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Häagen-Dazs ice cream produces a frozen yogurt aimed at health-conscious ice cream lovers. Before marketing the product in 2007, the company wanted to estimate the proportion of grocery stores currently selling Häagen-Dazs ice cream that would sell the new product. If 60% of the grocery stores would sell the product and a random sample of 200 stores is selected, what is the probability that the percentage in the sample will deviate from the population percentage by no more than 7 percentage points?
To compare the effectiveness of two treatments 1 and 2 for a particular disease. Patients were separated in 2 treatment groups. A patient in group 1 received treatment 1 and patients in group 2 received treatment 2.
Discuss examples where you would use test of hypothesis at your personal or professional life, in your education or society for the following situations:
Compute an exponential smoothing forecast with a =.20, an adjusted exponential smoothing forecast with a = .20 and B =.20 and a linear forecast. Compare the three forecast, using MAD and average error (E) and indicate which seem to be most accurat..
what will be the standard deviation of the share price if it is assumed that there is a 95% probability that the value will be at least 64?
Over the past 50 years, the number of hurricanes that have been reported are as follows: 9 times there were 7 hurricanes, 14 times there were 8 hurricanes, 19 times there were 11 hurricanes, and in the remaining years there were 14 hurricanes. Wha..
The heights of young women are approximately normal with mean 65 inches and standard deviation 2.5 inches.
Sample size of only 20. Find out a 95% confidence level for population Cp.
Calculate a 95% confidence interval for the mean endowment of all the private colleges in the United States assuming a normal distribution for the endowments.
The researchers claimed that of those who completed the program, 85% improved. What possible confounds can you identify in this study?
Do hotel managers on average vary significantly in femininity score from men in general?
Calculate correlation coefficient for these sample data.
Construct a 95 percent confidence interval for the difference in proportions for the two populations represented by these samples.
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