02 STAT descriptive statistics 1-IC Q1 Q2

# 02 STAT descriptive statistics 1-IC Q1 Q2 - INDEX CARD...

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1 DESCRIPTIVE STATISTICS Dr. V.R. Bencivenga Economic Statistics Economics 329 DESCRIPTIVE STATISTICS 1 INDEX CARD QUESTION 1 Two samples each contain two observations on a variable. a. The means of the two samples are the same, as are their standard deviations. Are the values of the two observations in the first sample necessarily the same as the values of the two observations in the second sample? Explain. b. How would your answer change if you were told only that the standard deviations of the two samples are the same? In this case, what do the two samples have in common? c. How does your answer change if each sample contains three observations instead of two? Explain.

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2 DESCRIPTIVE STATISTICS
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Unformatted text preview: INDEX CARD QUESTION 2 Start with the following set of numbers. For each part below, show how to modify this set of numbers to achieve the desired result. 0 5 10 15 20 a. Change two numbers so that the variance decreases but the mean and median are unchanged. b. Change two numbers so that (i) the variance increases, (ii) the range is unchanged, and (iii) the mean and median are unchanged. c. Change one number so that so that the variance and mean decrease. d. Add one number to the set such that the variance decreases, while the median and mean remain unchanged. e. Give a new set of five numbers that has the same range and variance as the set above, but the mean is zero....
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## This note was uploaded on 02/26/2012 for the course ECONOMICS 329 taught by Professor Bencivenga during the Spring '12 term at University of Texas.

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02 STAT descriptive statistics 1-IC Q1 Q2 - INDEX CARD...

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