In each of the following scenarios, tell if the researcher has committed a Type I error, a Type II error, or made a correct decision.

 a. A researcher is testing to determine if .31 of all families own more than one car. His null hypothesis is that the population proportion is .31. He randomly samples 600 families and obtains a sample proportion of .33 that own more than one car. Based on this sample data, his decision is to fail to reject the null hypothesis. The actual population proportion is .31.

b. Suppose it is generally known that the average price per square foot for a home in a particular U.S. suburb is $73. A researcher believes that due to the economy, the average may now be less than that. To test her belief, she takes a random sample of 45 homes in this community, resulting in a sample mean of $70 per square foot. The researcher’s decision based on this sample information is to fail to reject the null hypothesis. The actual average price per square foot is now $68.

 c. Suppose a utility researcher knows from past experience that the average water bill for a 2000-square-foot home in a large Midwest city is $25 per month. The utility researcher wants to test to determine if this figure is still true today. Her null hypothesis is that the population mean is $25. To test this, she randomly samples 63 homes, resulting in a sample mean of $29. From this, she decides to reject the null hypothesis. The actual average is $2

 

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in each pair of variables, make a brief argument for which is the predictor variable and which is the outcome variable.

A. Self-esteem rating and percent correct on a statistics exam

B. Trait-level extraversion and enjoyment of a surprise party

C. Time spent playing online video games and GPA

 

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In early 2010, Bela sold her personal residence to Sheneka for $450,000. At the time of the sale, Bela’s adjusted basis was $100,000. Within two months of the sale, Bela moved into a new residence she purchased for $700,000. What is Bela’s basis in her new residence?a.

 

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In early American Republic, in particular the administrations of Washington, Adams, and Jefferson. The examining the Louisiana Purchase, one of the significant developments in the geographic makeup of the United States. With the stroke of a pen, Jefferson added over 800,000 square miles to the size of the United States, incorporating some 60,000 non-Natives of various nationalities as well as hundreds of thousands of Native Americans. How did the criteria for citizenship and inclusion in American society change over time？How does education (language, Americanization) play a role? (textbook:Discovering the American Past by Wheeler&Glover)

 

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430000

In calculating the profit before depreciation, all expenses have been deducted, including the repairs and maintenance expense. 

Required

As the accountant for CBR Ltd, prepare separate depreciation schedules for the machinery for the 5-year period, using the following depreciation methods:

              i.        straight-line

            ii.        diminishing balance

           iii.        sum-of-years’-digits

           iv.        units-of-production.

Use the following headings for each schedule: ‘Year ending 30 June’, ‘Annual depreciation expense’, ‘Accumulated depreciation’, ‘Carrying amount at end of year’.

 

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