Solutions to Quiz - ECO220 Quiz#1(November 4 2005 SOLUTIONS(1 Which of the following is not a parameter(d(2 Which of the following statements about

# Solutions to Quiz - ECO220 Quiz#1(November 4 2005...

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ECO220 Quiz #1 (November 4, 2005) Page 1 of 1 SOLUTIONS (1) Which of the following is not a parameter? (d) (2) Which of the following statements about sampling error is true? (d) (3) Which of the following conclusions about var1 can be made based on the above summary? (e) (4) Which would be useful to assess whether these two variables are related? (b) (5) Which of the following conclusions about the variable y can reasonably be made based on the above graph? (a) (6) Which of the following conclusions about the variable y can reasonably be made based on the above graph? (c) (7) In general, which of the following statements is true? (c) (8) Approximately, what is the s.d. of the variable z? (c) (9) A sign on the gas pumps of a chain of gasoline stations encourages customers to have their oil checked by claiming that one out of five cars needs to have oil added. If this is true, what is probability that one out of the next five cars needs oil? (b) (10) Which of the variables shown in the box plot is shown in the histogram? (b) (11) Considering the following OLS (least squares) line, which of the following statements is true?

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