Transcript Chapter 4 - Distribution - ppt

DISTRIBUTION
Marginal and Conditional
Distributions for Parents and
Students as related to Smoking
Joint Counts … “AND” … A  B
ORIGINAL COUNT DISTRIBUTION
Parents and Students that smoke
Parent
Neither One Both Row Totals
NonSmoker
1168
1823 1380
4371
Smoker
188
416
1004
ColumnTotals
1356
2239 1780
Student
Marginal Totals
400
5375
MARGINAL DISTRIBUTION
Parent
Neither
One
Both
NonSmoker
1168
1823
1380
Smoker
188
416
400
ColumnTotals
1356
25.2%
5375
Student
2239 1780
41.7% 33.1%
5375 5375
Row Totals
4371
81.3%
5375
1004
18.7%
5375
5375
JOINT & MARGINAL DISTRIBUTION
Parent
NonSmoker
Student
Smoker
Neither One
1168
1823
21.7% 33.9%
5375
5375
Both Row Totals
1380
25.7%
81.3%
5375
3.5%
7.7%
7.4%
188
416
400
5375
5375 5375
ColumnTotals 25.2% 41.7% 33.1%
18.7%
5375
CONDITIONALDISTRIBUTION
Parent by Student
Parent
NonSmoker
Student
Neither One Both Row Totals
1168
1823 1380
26.7% 41.7% 31.6%
4371
4371
4371 4371
188
416
400
18.7%
41.4%
39.8%
1004
1004
1004
ColumnTotals 1356
2239 1780
Smoker
1004
5375
CONDITIONALDISTRIBUTION
Student by Parent
Parent
NonSmoker
Student
Neither One
1168
1823
86.1% 81.4%
2239
1356
Both Row Totals
1380
77.5%
4371
1780
188
416
400
13.9%
18.6%
22.5%
2239
1356
1780
ColumnTotals 1356
2239 1780
Smoker
1004
5375