02 STAT descriptive statistics 2-IC Q1

# 02 STAT descriptive statistics 2-IC Q1 - i’s weekly...

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1 DESCRIPTIVE STATISTICS Dr. V.R. Bencivenga Economic Statistics Economics 329 DESCRIPTIVE STATISTICS PART 2 INDEX CARD QUESTION 1 Suppose you have data for a large number of rural households in a developing country on X i = calories consumed per week by household i (in thousands) Y i = income per week of household i (in rupees) Now create a new variable Z i that equals the deviation of household
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Unformatted text preview: i’s weekly income in hundreds of rupees from the sample mean. (To get Z i from Y i , change the units to hundreds, and then take deviations from the mean.) a. What is the value of ? Z Explain. b. What is the relationship between 2 Z s and 2 Y s ? c. What are the units of s XY and s XZ ? What is the relationship between s XY and s XZ ? d. Show that XY XZ r r ....
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