Description
Question 4
Work through each of the following items and use the chi-square test of independence to determine whether the categorical variables in your chosen question are related.
1 Which question are you investigating? Copy and paste the question into your response.
2 What is the explanatory variable, and what is the response variable?
3 State your hypotheses in context (the variables should be clear in each hypothesis).
4 Use StatCrunch to find the observed counts, row percentages, and expected counts. Select the explanatory variable as the row variable and the response variable as the column variable. (directions – opens in a new tab).
? Copy and paste the contents of the StatCrunch output window into your response (copy everything even the chi-square table).
? Complete the following tasks to make your table more meaningful to the reader.
? Provide a descriptive title above your table. Replace each numeric row label with the appropriate descriptive word(s).
? Replace each numeric column label with the appropriate descriptive word(s).
? Add any other information that will make the table more meaningful to the reader.
5 Interpret the expected counts for each response in the 3rd column of your table. No need to show how the expected counts were calculated, but each interpretation should include a relevant percentage.
6 Determine whether conditions are met to use the chi-square test of independence. For each condition explain why the condition is met or not met.
7 Chi-square test of independence:
? If conditions are met, use the StatCrunch chi-square output (included with your contingency table above) to state your conclusion in context.
? If conditions are not met, select a different question where conditions are met. Repeat all steps above, but do not delete your original work. Instead, include your new responses under your previous responses.
? If conditions are not met for every question listed above with your IAT data set, contact me.
Contingency table results:
Rows: Sample(Birth-Gender)
Columns: Sample(IAT-Weight-Score)
Cell formatCount
(Row percent)
(Expected count)-2 to -1.5-1.5 to -1-1 to -0.5-0.5 to 00 to 0.50.5 to 11 to 1.5Total11
(0.52%)
(0.27)2
(1.04%)
(0.55)3
(1.56%)
(4.94)17
(8.85%)
(22.77)69
(35.94%)
(68.85)81
(42.19%)
(78.72)19
(9.9%)
(15.91)192
(100%)20
(0%)
(0.73)0
(0%)
(1.45)15
(2.95%)
(13.06)66
(12.99%)
(60.23)182
(35.83%)
(182.15)206
(40.55%)
(208.28)39
(7.68%)
(42.09)508
(100%)Total1
(0.14%)2
(0.29%)18
(2.57%)83
(11.86%)251
(35.86%)287
(41%)58
(8.29%)700
(100%)
Chi-Square test:
StatisticDFValueP-valueChi-square611.9162360.0639Warning: over 20% of cells have an expected count less than 5.
Chi-Square suspect.
