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econ 2500 practice midterm past exam gordana colby Introductory Statistics for Economists I Page 1 econ 2500 practice midterm past exam gordana colby Introductory Statistics for Economists I Page 2 econ 2500 practice midterm past exam gordana colby Introductory Statistics for Economists I Page 3 econ 2500 practice midterm past exam gordana colby Introductory Statistics for Economists I Page 4
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About the Download

Course Director: Gordana Colby

AP/ECON 2500 3.0E

Midterm Examination Solutions

Fall 2011

Question #1 (12 Marks) The following are the golf scores of 12 members of a women’s golf team in tournament play:

89 90 87 95 86 81 102 105 83 88 91 79

Hint:

n
xi x 2 674.3979
1

a) Present the distribution by a stemplot and describe its main features. b) Compute the mean, variance, and standard deviation of these golf scores.
c) Then compute the median, the quartiles, and the IQR. Are there any suspected outliers by the 1.5 IQR
criterion? d) Based on the shape of the distribution, would you report the standard deviation or the quartiles as a
measure of spread?

Solution

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