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- Collaborative statistics
- The chi-square distribution
- Practice 2: contingency tables
This module provides a practice on Chi-Square Distribution as a part of Collaborative Statistics collection (col10522) by Barbara Illowsky and Susan Dean.
Student learning outcomes
- The student will conduct a test for independence using contingency tables.
Conduct a hypothesis test to determine if smoking level and ethnicity are independent.
Collect the data
Copy the data provided in
Probability Topics Practice 1: Contingency Tables into the table below.
Smoking levels by ethnicity (observed)
| Smoking Level Per Day |
African American |
Native Hawaiian |
Latino |
Japanese Americans |
White |
TOTALS |
| 1-10 |
|
|
|
|
|
|
| 11-20 |
|
|
|
|
|
|
| 21-30 |
|
|
|
|
|
|
| 31+ |
|
|
|
|
|
|
| TOTALS |
|
|
|
|
|
|
Hypothesis
State the hypotheses.
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Expected values
Enter expected values in the above below. Round to two decimal places.
Analyze the data
Calculate the following values:
Graph the data
Conclusions
State the decision and conclusion (in a complete sentence) for the following preconceived levels of
.
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Source:
OpenStax, Collaborative statistics. OpenStax CNX. Jul 03, 2012 Download for free at http://cnx.org/content/col10522/1.40
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