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Retention Test Scores A sample of non-English majors at a selected college was used in a study to see if the student retained more from reading a 19th-century novel or by watching it in DVD form. Each student was assigned one novel to read and a different one to watch, and then they were given a 20-point written quiz on each novel. The test results are shown below. At a = 0.05, can it be concluded that the book scores are higher than the DVD scores?
Book
90
80
75
84
DVD
85
72
70
A manufacturer of car batteries claims that his batteries will last, on average, 3 years with a variance of 1 year. If 5 of these batteries have lifetimes of 1.9, 2.4, 3.0, 3.5, and 4.2 years
Calculate a value of lambda using the data from last week concerning the news networks and the reporting practices. Compare your resulting lambda to the resulting chi-square from last week.
you are considering starting a walk-in clinic. your financial projections for the first year of operations are as
Defective calculator is 10%. If 10 calculators are selected at random, what is the probability that 4 or more of the calculators will be defective?
1. create the data set.a. using the activity 6a.sav file as a starting point create a new dataset that you can use with
an experimenter wants to conduct a hypothesis test on a claim that there was no difference between two population
suppose a manufacturing company makes a certain item. the time to produce each item is normally distributed around a
Computer stocks currently provide an expected rate of return of 16%. Dell, a large computer company, will pay a year-end dividend of $2 per share.
With what degree of confidance can we state that the average weekly salary for all teachers in this area is between $487 and /4517.
according to studies by vha inc. an alliance of community hospitals on average it takes 49 minutes before a doctor sees
A final exam in Statistics has a mean of 73 with a standard deviation of 7.73. Assume that a random sample of 24 students is selected and the mean test score of the sample is computed. What percentage of sample means are less than 70?
in a normal distribution with mean 50 and a standard deviation 10 what is the probability of randomly sampling a
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