QR Fall 2002

Case 3: Race and Residence in Massachusetts

Lab 3

 

 

A: More crosstabs

 

Analyze ® Descriptive Statistics ® Crosstabs

 

  1. Recode median income (mdfam_in) into two or three discrete categories.

 

            What are your new categories?

 

            mincnew

 

            Low _____ to _____                Medium _____ to _____          High     _____ to _____

 

            Make sure to label the new variables and category values appropriately in            Variable View so you (and we) can read your output.

 

 

  1. Using the race and ethnicity variables you re-classified into 2 or 3 categories in Lab 2 construct two tables describing

 

a)      the median income by percent black for all MA census tracts

b)      the median income by percent hispanic for all MA census tracts.

 

 

  1. Percentage the tables in the appropriate direction

 

 

  1. Describe the patterns you see in a few sentences. Is the pattern different for African-Americans and Hispanics/Latinos?

 

 

 

 

 

 

 

 

 

 

 

 

 

 

  1. Formally state the research and null hypotheses for these tables

 

Table 1

Research Hypothesis:

 

 

 

 

Null Hypothesis:

 

 

 

 

Table 2

Research Hypothesis:

 

 

 

 

Null Hypothesis:

 

 

 

 

 

 

  1. Calculate the chi-square statistic for each table using SPSS.

 

  1. Interpret the chi-square output in a few sentences (in English please!). Remember to attach all output to the lab.

 

 

 

 

 

 

 

 

 

 

 

 

 

TAKE HOME OPTIONAL: this exercise will really help your your final project.

 B: Elaborating the bivariate tables: 3-way crosstabs

 

 

  1. Construct a 3-way crosstab for the relationship between proportion hispanic and median income in a tract, controlling for the proportion African-American.

 

  1. Percentage the tables in the appropriate direction, and calculate the chi-square statistics using SPSS

 

  1. Describe the patterns you see in a few sentences and interpret the chi-square statistic. Is the pattern different for African-Americans and Hispanics/Latinos?  Is the relationship between percent hispanic and median income conditional on the percent black in a tract? That is, are tracts with both high African-American and high Hispanic populations even more disadvantaged than tracts that are characterized by a large Hispanic population that is not African-American?