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Question: A study was recently conducted by the Bonneville Power Association (BPA) to determine attitudes regarding the association's policies in western U.S. states. One part of the study asked respondents to rate the performance of the BPA on its responsiveness to environmental issues. The following responses were obtained for a sample of 12 urban residents and 10 rural residents. The ratings are on a 1 to 100 scale, with 100 being perfect.
a. Based on the sample data, should the BPA conclude that there is no difference between the urban and rural residents with respect to median environmental rating? Test using a significance level of 0.02.
b. Perform the appropriate parametric statistical test and indicate the assumptions necessary to use this test that were not required by the Mann-Whitney tests. Use a significance level of 0.02.
You plan to obtain a simple random sample of 30 students by using the sampling frame of students present next Monday.
What proportion of travelers arrive at the airport more than 78.1 minutes before their departure?
An investment broker reports that the yearly returns on common stocks are approximately normally distributed with a mean return of 12.4 percent and a standard deviation of 20.6 percent.
a). Is this evidence at 1% level that Professor Han's method produces less than 25% grades less than a C? b). What is the p-value for your test?
Post a message in the Discussion area that answers the following question. Do you think the person has ESP or can their success ratio be attributed to chance variation?
air enters a steady state compressor state 1a at 1.36 bar and 32ordmc with a volumetric flow rate av1a of 0.62 m3s. the
How optimal or non-optimal is today's level of economic inequality in the USA? This is the subject for a couple of writing assignments. Are we too equal? Too unequal? About right?
If you did guess at each of 15 true-false questions, what is the expected value of X = number of correct answers? Is the expected value a possible score on the quiz? What exactly does the expected value tell us?
Suppose that a person searches through leaves on a tree until he finds one with at least two eggs. Letting X = the number of leaves searched, what is the expected value and variance of X?
If the unit cost of production is $400, unit revenue is $1000, and unit cost of unfulfilled demand is $0, determine the output that maximizes the expected total profit.
Let α=0.05. What is your decision regarding the hypothesis? Write your conclusion in a sentence and discuss whether there is sufficient data to support your decision.
a statewide real estate agency new colony specializes in residential home sales in southern california. records
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