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A sample of 100 flights for United Airlines shows that 64 are on time. A sample of 100 flights for American shows that 80 were on time. All flights that were not on time are considered delayed. Analyze the data for no relationship between airline and on time performance using a contingency table (Chapter 9, chi-square methods) at alpha=0.10.
Specify Ho and Ha, show the p-value, state whether you reject Ho or not and state your general conclusion.
In a study shop, a set of data was collected to determine whether or not the proportion of defectives produced. Determine if the proportion of defectives is the same for all three shifts.
NCAA Basketball Tournament. Each year, 64 college basketball teams compete in the NCAA tournament. Sandbox.com recently offered a prize of $10 million to anyone who could correctly pick the winner in each of the tournament games.
For a standard normal curve, find the z-score that separates the bottom 90% from the top 10%.
you want to know if amount of studying done by students in greek organizations sororities and fraternities differs from
Fixed construction cost for upper-deck area is evaluated to be $1,500,000, with variable cost of $50,000 for each box constructed. Determine the breakeven point for number of luxury boxes in new stadium?
What is the probability that an assembly chosen at random will have a combined dimension in excess of 262?
Identify and justify which type of sampling (random, stratified, systematic, cluster, convenience) is used in the following examples.
Assume that the population proportions are to be estimated from the samples described. Find the margin of error and the 95% confidence interval.
For the binomial lattice model, Sn = S0 Y1 × · · ·×Yn , suppose p = 0.75,d = 0.90, u = 1.5:When r = 0.05: Show that the stochastic process Mn = Sn /(1 + r)n , n ≥ 0, forms a SUBmartingale.
Develop hypotheses so that rejection of the null hypothesis will allow us to conclude that the most recent bullish sentiment is weaker than that of one month ago.
one hundred items are simultaneously put on a life test. suppose the life-times of the individual items are independent
a local environmental organization is interested in determining if the proportion of suvs un sb has increased from the
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