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Researchers in retail studies wanted to ?nd out how children and adults react to companies' pricing tactics. They looked at a random sample of 44 10th-grade stu- dents, a random sample of pretested adults consisting of 42 people, and a third sam- ple of 71 adults. For each person, they evaluated the response to a pricing tactic. The reported overall level of signi?cance was p 0.01. A further analysis of differences between every pair of groups was reported as all p <>0.01.9 Interpret these reported ?ndings. What were the degrees of freedom for Factor, Error, and Total?
A statistics professor would like to determine whether students in the class showed improved performance on the final exam as compared to the midterm examination.
during a recent year the average cost of making a movie was 54.8 million. this year a random sample of 15 recent action
the two largest cable providers are concast cable connections with 21.5 million subscribers and time warner cable with
A researcher randomly divides two groups of people
a certain office building infrequently experiences power outages. it is known that the probability of a power outage on
many retails stores offer their own credit cards. at the time of the credit application the customer is given a 10
the city transit authority plans to hire 12 new bus drivers. from a group of 100 qualified applicants of whom 65 are
a primatologist believes that rhesus monkeys possess curiosity. she reasons that if this is true then they should
Formulating null and alternative hypothesis to test the claim averaging about $5000.
Can we conclude from this that most workers there earn between $25 and $35 per hour? Is this the right interpretation for the margin of error?
quadrants of the BCG Matrix
i what is the sampling distribution of a sampe mean for a normally distributed random variable.ii if a variable iq is
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