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1BUAD310 SPRING 2017 SAMPLE FINAL EXAM TEST FORM APlease print and mark your name, USC ID number and test form neatly on the Scantron. Make sure to clearly mark your answer by selecting one of the choices. If you mark the wrong answer, you will receive a “0” for that question. Please be very careful when marking your choice because no credit will be given if your calculations are correct but you marked the wrong answer. Make sure to read the questions very carefully and select the best answer. You have 120 minutes (2 hours) to complete the test.
Write 'T' if the statement is true and 'F' if the statement is false. 1)The level of significance refers to the probability of making a Type II error. 1) 2)In hypothesis testing, we cannot prove a null hypothesis is true. 2) 3)A hypothesis test may be statistically significant, yet have little practical importance. 3) 4)For a sample of nine items, the critical value of Student's t for a left-tailed test of a mean at α = .05 is -1.860. 4) 5)If the null and alternative hypotheses are H0: μ ≤ 100 and H1: μ > 100, the test is right-tailed. 5) 6)A scatter plot is used to visualize the association (or lack of association) between two quantitative variables. 6) 7)
The correlation coefficient r measures the strength of the linear relationship between two variables. 7) 8)A sample correlation r = .40 indicates a stronger linear relationship than r = -.60. 9)A fitted regression Profit = -570 + 30 Sales (all variables in thousands of dollars) was estimated from a random sample of 20 pharmacies. For a pharmacy with Sales = 10, we predict that Profit will be: 10)A fitted regression Profit = -570 + 30 Sales (all variables in thousands of dollars) was estimated from a random sample of pharmacies. From this regression, in order to break even (Profit ≥ 0), a pharmacy's Sales would have to be at least:
311)Which of the following is true of the correlation, r?