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Translating research questions into hypotheses
Translate each of the following research questions into appropriate H0 and Ha.
(a) Census Bureau data show that the mean household income in the area served by a shopping mall is $62,500 per year. A market research ?rm questions shoppers at the mall to ?nd out whether the mean household income of mall shoppers is higher than that of the general population.
(b) Last year, your company's service technicians took an average of 2.6 hours to respond to trouble calls from business customers who had purchased service contracts. Do this year's data show a different average response time?
a cola dispensing machine is set to dispense 9 oz. of cola per cup with a standard deviation of 1 oz. the manufacturer
individuals filing federal income tax returns prior to march 31 received an average refund of 1056. consifer the
Calculate p-value of F test for Given Dataset
the following data give the time in minutes taken to commute from home to umkc for 20 students.10 50 65 33 48 5 11 23
Sample without replacement when testing batches of products. When sampling without replacement, should you use the multiplication rule for independent or dependent events.
the wilhelms cola company plans to market a new pineapple-flavoured cola this summer. the decision is whether to
a researcher wished to compare the effect of two stepping heights low and high on heart rate in a step-aerobics
q2. hospital stays.theu.s.nationalcenterforhealthstatisticscompilesdataon
sports fans tune to a local sports talk radio station according to a poisson process with the rate of three fans every
Why is it important to study ethics in statistics? Have you seen statistics misused? Without naming specific companies or people, can you provide examples?
In a clinical study of an allergy drug, 112 of the 210 subjects reported experiencing significant relief from their symptoms. At the 0.01 significance level,
What is the test value? A sociologist wants to determine if the life expectancy of people in Africa is less than the life expectancy of people in Asia. Calculate the critical value. Use a=0.05.
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