Quiz - ECO220 Quiz#1(November 3 2006 FORM 01 SOLUTIONS Page 1 of 1(1 Why is sampling error important(A(2 A histogram is a useful description of which of

Quiz - ECO220 Quiz#1(November 3 2006 FORM 01 SOLUTIONS Page...

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ECO220 Quiz #1 (November 3, 2006) FORM 01 Page 1 of 1 SOLUTIONS (1) Why is sampling error important? (A) (2) A histogram is a useful description of which of the following? (C) (3) Which of the following graphs could have been created with these same data? (C) (4) Which conclusion about X and Y would be most reasonable? (B) (5) What is the sample mean of Y (to nearest hundredth)? (A) (6) What is the sample median of Y (to nearest tenth)? (A) (7) Approximately, what is the sample standard deviation? (B) (8) Why is the distance between the 50 th and 75 th percentile smaller than the distance between the 75 th and 100 th percentile? (E) (9) Which of the following offers a correct interpretation of these estimates? (D) (10) What kind of data are these? (E) (11) Which of the following is an example of a stratified random sample? (A) (12) Which of the following imply P(A | B) = P(B | A)?
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