CHI Square

Front

What does a level of significance of 5% mean?

Back

There's a 5% chance we'll be wrong if we reject the null hypothesis.

Front

What is the Chi Square value for observed: 10 circles (expected: 12), 20 squares (expected: 18), 30 triangles (expected: 30)?

Back

.55, accept the Null.

Front

What is the expected number for circles if observed: 10 circles, expected: 12?

Back

12

Front

If the χ² critical value = 5.99 and the χ² calculated value = 7.35, what is the conclusion?

Back

Reject Ho.

Front

What is the purpose of a Chi-Square test?

Back

To determine if there is a statistically significant difference between the observed and expected values in an experiment.

Front

What is the formula for calculating Chi Square?

Back

χ² = Σ((O - E)² / E) where O = observed frequency, E = expected frequency.

Front

What does it mean to reject the null hypothesis?

Back

It means there is sufficient evidence to suggest that the observed data significantly differs from the expected data.

Front

What is the null hypothesis in a Chi-Square test?

Back

The null hypothesis states that there is no significant difference between the observed and expected frequencies.

Front

What is the alternative hypothesis in a Chi-Square test?

Back

The alternative hypothesis states that there is a significant difference between the observed and expected frequencies.

Front

What are degrees of freedom in a Chi-Square test?

Back

Degrees of freedom = (number of categories - 1).