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In a recent survey, 10 percent of the participants rated Pepsi as being "concerned with my health." PepsiCo's response included a new "Smart Spot" symbol on its products that meet certain nutrition criteria, to help consumers who seek more healthful eating options. At α = .05, would a follow-up survey showing that 18 of 100 persons now rate Pepsi as being "concerned with my health" prove that the percentage has increased? (Data are from The Wall Street Journal, July 30, 2004.)
Implement your model on a spreadsheet and find the optimal solution using Solver.
Women's heights are normally distributed with mean 63.6 and standard deviation of 2.5 in. A social organization for tall people has a requirement that women must be at least 70 in tall.
In each of the following scenarios, which would be larger, the mean or median, or would the mean and median be about the same? Provide reasoning--think about the shape of the histogram for the data and how the shape would affect the relationship b..
The sample mean is 2.59 and the sample standard deviation is .66. Conduct the following test using 95% level of confidence.
Based on data from Neilsen Media Research survey 44% of 5108 randomly selected households had their televisions sets tuned to the Superbowl on game day. Identify the sample, the population, and explain if the sample is likely to be representative ..
Given the following data, use exponential smoothing with a=0.2 and a=0.5 to generate forecasts for periods 2 through 6. Use MAD and MSE to decide which of the two models produced a better forecast.
A better case can be made that observation 13 (Los Arboles) is an outlier. Describe what this means in plain terms.
A market researcher is interested in knowing the type of training that works best for DVD users. Thirty consumers are randomly selected from a population of known DVD owners (i.e., users).
What is the approximate permutation test P-value and What is the permutation test P-value for testing the equality of the means versus the hypothesis that the mean change for the treatment group is larger than the mean treatment for the control gro..
Assume that 60 percent of the voters in a particular region support a candidate. Find the probability that a sample of 1,000 voters will yield a sample proportion in favor of the candidate within 4 percentage points of the actual proportion.
Assume there're three states of the economy: boom, moderate growth, and recession. The annual return on company A stock and company B stock in each state of the economy is given below
Determine a forecast for the average weekly sales in year 5 for each of the three seasons.
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