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binomial data: What is a chi-square test of independence?
A hypothesis test for two columns of binomial data.
binomial data: Select all parts of the Step A: Abstract for a chi-square test of independence?
(50%) Collect the counts of the data values of the two variables.
(50%) Arrange in a 2x2 table and calculate the table totals.
binomial data: In Step A: Abstract for a chi-square test of independence, what are the final steps to complete the 2x2 table of descriptive statistics?
(50%) Calculate the Row Totals.
(50%) Calculate the Column totals.
binomial data: In Step A: Abstract for a chi-square test of independence, what are the two hypotheses?
(50%) H(0): Variables are independent.
(50%) H(1): Variables are dependent.
binomial data: In Step 1: Theorize for a chi-square test of independence, what are the shapes of the chi-square distributions?
(50%) The curve is uni-modal.
(50%) The curve is skewed to the right.
binomial data: In Step 1: Theorize for a chi-square test of independence, how many tail(s) situation is this?
(100%) One-tail to the right situation.
binomial data: Select all parts of the Step 2: Analyze for a chi-square test of independence?
(50%) Calculate each cell's expected frequency.
(50%) Calculate the value of the chi-square test statistic.
binomial data: In Step 2: Analyze for a chi-square test of independence, what are the expected frequencies?
The theoretical count in each cell if the variables are independent
binomial data: What is the difference between a descriptive 2x2 table of counts, and a contingency table?
A contingency table shows the expected frequencies in each cell.
binomial data: In a chi-square test of independence, what is the p-value?
The area in one tail of the chi-square curve from the test statistic to infinity.
binomial data: In a chi-square test of independence, using the information shown below, are these two variables independent?
These variables are dependent, because p-value = 0.005.
binomial data: In a chi-square test of independence, using the information shown below, are these two variables independent?
These variables are independent, because p-value = 0.3155.
binomial data: In a chi-square test of independence, using the information shown below, is being overweight related to eating fast food?
Yes, being overweight and eating fast food are related, because p-value = 0.0323.