Check that the requirements for the theoretical model are met for the data on semester average marks and hours spent working. When the professor checked the data, she noticed that there were two unusually low marks: a 22 and a 28. When she investigated further, she realized that the students with these low marks had withdrawn from the course (all of the other students completed the course). As a result, these two data points should not be included in the data set. Reassess the data, with these two erroneous data points removed.
Answer to relevant QuestionsCheck the requirements for regression for the data set of the TSX and the DJI described in Exercise 8.Is this data set a random sample? Aries Car Parts maintains inventory of a wide array of car parts. The owner is old-fashioned, and has not allowed computers to be used in the business, so records are kept manually. An auditor has calculated the actual value ...Check the requirements for regression for the data set of overall average marks and company test scores from Exercise 20. In exercise A large company has developed a written test to screen applicants, and the mark on this ...The Standard and Poor's Toronto Stock Exchange Composite Price Index (TSX) measures the performance of the broad Canadian stock market. The Dow Jones Industrial Average (DJI) tracks the performance of the U.S. stock market. ...Use Excel to create a 95% confidence interval of average Woodbon sales, when mortgage rates are 6%, housing starts are 3,500, and advertising expenditure is $3,500. Interpret the interval.
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