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Question: You want to determine the percentage of Fortune 500 CEOs who think Indiana University (IU) deserves its current Business Week rating. You mail a questionnaire to all 500 CEOs and 100 respond. Exactly half of the respondents believe IU does deserve its ranking.
a. Find a 95% confidence interval for the fraction of Fortune 500 CEOs who believe IU deserves its ranking.
b. Suppose again that you want to estimate the fraction of Fortune 500 CEOs who believe IU deserves its ranking. Your goal is to have only a 5% chance of having your estimate be in error by more than 0.02. What size sample would you need to take?
How much can a dollar buy? The buying power of a dollar changes over time. The Bureau of Labor Statistics measures the cost of a "market basket" of goods.
In an attempt to compare the assessments provided by the four assessors it employs, a municipal official sends each assessor to view the same five homes.
A research team conducted a study of soft-drink preferences among residents in a test market prior to an advertising campaign for a new cola product.
question 1 a project being analyzed by pert has 38 activities 16 of which are on the critical path. if the estimated
Verify that for the following pairs of points, the least squares regression line has a slope of zero. Plot the points and comment on the assumption that the regression line is straight.
Calculate the range, variance, and standard deviation for these sample data.
If in a random poll of 250 residents, 150 residents were in favor, how accurate is this result as an estimate of the proportion?
Based on the data provided, which of these funds has exhibited greater relative variability? Use the proper statistical measure to make your determination.
X(t) is a wide sense stationary stochastic process with autocorrelation function RX (τ ) = 10 sin(2π1000t)/(2π1000t). The process Y(t) is a version of X(t) delayed by 50 microseconds: Y(t) = X(t - t0) where t0 = 5 × 10-5s.
the common fruit fly drosophila melanogaster is the most studied organism in genetic research because it is small easy
Find the sampling distribution for the maximum number of mounts.- Find the sampling distribution for the total number of mounts.
According to the national institute of allergy and infectious diseases, about 3.7% of American adults have food allergy. A large company plans a lunch reception for its 400 employees. Assume that employees are independent. Let the random variable ..
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