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You are employed with Northeast Airlines and have been asked to determine the rate of on-time arrivals for four competing airlines at a proposed hub location. Currently Northeast ranks in the top three for on-time arrivals with an average on-time arrival rate of 82%. The company wants to exceed the on-time rate of competitors at the new hub. Hundreds of flights arrive at the location daily.
What are the primary advantages and disadvantages of employing sampling in this application?
Use the traditional method to test the given hypothesis. Assume that the population is the normally distributed and that the sample has been randomly selected.
Prepare an analysis of your survey. Determine if you have used the appropriate measures to research your business problem, and identify the level of measurement being used for each of your survey questions.
What is the probability that a simple random sample of 40 male graduates will provide a sample mean within $10,000 of the population mean, $168,000 (to 4 decimals)?
Find a 99% confidence interval for the population mean number of weekly miles.
The estimated simple linear regression equation minimizes the sum of the squared deviations between each value of Y and the line.
At α = .05, is there a difference in variances? Illustrate all steps clearly, including the illustration of the decision rule.
Using alpha = 0.05 and a computed value of +4.49, can we conclude that the percentage of claims for married policyholders is less then for single policyholders?
Previous studies have indicated the standard deviation of annual earnings for college students is $850. How large a sample would need to be taken to estimate the mean for college students' annual earnings to within $200 with 99% confidence?
If a null hypothesis is rejected at a significance level of .01, it will ______ be rejected at a significance level of .05
Can you provide an example using your own data set (two related and unrelated variables) of at least twenty numbers each and apply the formula of correlation. Determine the correlation of each of the two sets of data.
When studying simultaneous responses to two categorical questions, we should set up a a) contingency table. b) frequency distribution.
Assume P1 and P2 move simultaneously. Represent this game in normal form.
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