Mathematics > QUESTIONS & ANSWERS > MATH 111 Final Quiz 8. Graded A. (All)
MATH 111 Final Quiz 8. Graded A.
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(10 Points) Suppose a rare disease occurs in 1 out of 1000 people. A test for the disease has sensitivity of 95% and specificity of 90%. Construct a contingency table with disease status for the row... s and test result for the columns. Then find the probability that a person actually has the disease given that his/her test result is positive. Show your work. The United States Census Bureau, Statistical Abstract of the United States 1999 (p. 877) contains a table listing median family income for each year from 1947 to 1997. The incomes are presented “in current dollars” and “in constant (1997) dollars.” As an example, the median income in 1985 in “current dollars” was $27,735 and in “constant (1997) dollars” it was $41,371. The CPI in 1985 was 107.6 and in 1997, it was 160.5. a. (5 points) Explain what is meant by “in constant (1997) dollars.” Show your work by using the CPI in 1985 and 1997. (5 points) Suppose that the median family income in 1997 was $44,568. Adjust it to the equivalent median family income in 1985 and compare it to the median family income in 1985 in “current dollars”. Report the percent increase or decrease from 1985 to 1997. Show your work. [Show More]
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