Based on MTF2011 data, we present the cross-tabulation for student race and how
ID: 3437451 • Letter: B
Question
Based on MTF2011 data, we present the cross-tabulation for student race and how many of their friends smoke marijuana.
Data:
Black White Hispanic Total
How many friends smoke marijuana? 1. NONE
2. A FEW
3. SOME
4. MOST
5. ALL
Total
50
34
40
47
8
179
138
208
229
184
30
789
33
36
53
53
11
186
221
278
322
284
49
1154
a. Identify the dependent and independent variables for this table.
b. What proportion of black, white, and Hispanic respondents reports that most or all of their friends smoke marijuana?Calculate these proportions separately.
c. Explain the relationship between student race and the number of friends who smoke marijuana.
How many friends smoke marijuana? 1. NONE
2. A FEW
3. SOME
4. MOST
5. ALL
Total
50
34
40
47
8
179
138
208
229
184
30
789
33
36
53
53
11
186
221
278
322
284
49
1154
Explanation / Answer
a)Here the independent vairable is the ethnicity or student race (black,white and hispanic) and the dependent variable is the person who smoke.
b)Sum of the most=284
Sum of the all =49
Most+All =284+49=333
c)The friends who smoke marijuana is highest among the white then hispanic and it is least in the black
Proportion who smoke (most+all)=333/1154 =.28856
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