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An airline's data indicate that 50 percent of people who begin the online process of booking a flight never complete the process and pay for the flight. To reduce this percentage, the airline is considering changing its website so that the entire booking process, including flight and seat selection and payment, can be done on two simple pages rather than the current four pages. A random sample of 300 customers who begin the booking process are exposed to the new system, and 117 of them do not complete the process. (1) Formulate the null and alternative hypotheses needed to attempt to provide evidence that the new system has reduced the noncompletion percentage. (2) Use critical values and a p-value to perform the hypothesis test by setting a equal to .10, .05, .01, and .001.
1.The following random sample was selected from a normal distribution: 4, 6, 3, 5, 9, 3.It would be useful to draw the normal curve to illustrate the confidence intervala.Construct a 90% confidence interval for the population mean.b.Construct a..
Dana Davenport donates eight hours of her time on a Saturday to help out a qualified charity. What is her charitable contribution deduction?
Comment on the sign of each estimated coefficient in turn, and state whether this is what you expect. Ignore significance at this stage.
Give the state transition probability matrix
A statistics professor plans class so carefully that the lengths of his classes are uniformly distributed between 45.0 and 55.0 minutes. find the probability that a given class period runs greater than 50.75 minutes? find the probability of se..
A survey of people in Iowa showed that 40 out of 400 prefer watching TV comedy shows. Another survey in Colorado showed that 90 out of 600 prefer watching TV comedy shows. At a 1% significance level, would it seem that the true proportions of p..
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The average yearly cost per household of owning a dog is $186.80. Suppose that we randomly select 50 households that own a dog. What is the probability that the sample mean for these 50 households is less than $175.00? Assume = $ 32.
The control chart is a graph used to track and monitor how a process develops or changes over time. A control chart always has a central line for the average, an upper line for the upper control limit and a lower line for the lower control limit. The..
What is the value of the test statistic and the chi-square table, the most accurate statement that can be made about the p-value
The following data represents the grades of a sample of 12 students in statistics and economics as follows Math grade A C B B D B F F D C B C Economic Grade B F ..
Archie is taking a course in probability theory. Discussion sessions with the class TA (teaching assistant) conflict with Archie's trips to the beach. Archie has to decide between attending TA sessions, which might help him do better in the probabili..
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