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pam 210 Homework 1

# pam 210 Homework 1 - Families with 2 earners Families with...

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Homework 1 PAM 210 Intro to Stats A. Sinan Ünür Julie Melamud Nanditha Ramachandran February 16, 2007

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1) Describe the data set: Variables : Median incomes of the: families with no earners, families with 1 earner, families with 2 earners, and families with 3 earners (in dollars) Observational units: States 2) Calculate the five number summary for each quantitative variable Variable Minimum Q1 Median Q3 Maximum Families with no earner 11514 24441 27351 30695 36918 Families with 1 earner 28382 33524 37492 42434 51881 Families with 2 earners 56368 61928 66629 76590 91787 Families with 3 earners 69692 78234 82763 91325 110383 3) Compare the distributions of the quantitative variables by generating histograms: Median Income, dollars Frequency 120000 100000 80000 60000 40000 20000 0 20 15 10 5 0 120000 100000 80000 60000 40000 20000 0 20 15 10 5 0 Families with no earners Families with 1 earner
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Unformatted text preview: Families with 2 earners Families with 3 or more earners Median I ncome of Families in the United States Families with no earners: Slightly skewed to the left, almost symmetric Families with 1 earner: Slightly skewed to the right. Families with 2 earners: Skewed to the right. Families with 3 earners: Skewed to the right. 4) Look for outliers: Number of Earners in Family Median Income, dollars 3 or more earners 2 earners 1 earner no earners 120000 100000 80000 60000 40000 20000 Median I ncome of Families in the United States There is one outlier present. The outlier is the observation for the families with no earners for the District of Columbia, with a median income of 11,514....
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pam 210 Homework 1 - Families with 2 earners Families with...

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