Chi Square - Test

Front

What is the null hypothesis in a Chi Square test?

Back

The null hypothesis states that injury type is independent of the position played.

Front

What is the probability that maths is a male student's favorite subject if given the options: 0.491, 0.225, 0.443, 0.508?

Back

0.443

Front

How do you find the degrees of freedom in a Chi Square test?

Back

Degrees of freedom can be calculated as (number of rows - 1) * (number of columns - 1).

Front

What is the χ² calculated value for a given situation if the options are: 6.65, 6.66, 0.00991, 1?

Back

6.65

Front

In the test statistic of a Chi Square test, what does the 'O' represent?

Back

The 'O' represents Observed Frequency.

Front

What does the 'E' represent in the Chi Square test statistic?

Back

The 'E' represents Expected Frequency.

Front

What is the formula for calculating the Chi Square statistic?

Back

χ² = Σ((O - E)² / E) where O is the observed frequency and E is the expected frequency.

Front

What is the significance level (alpha) commonly used in Chi Square tests?

Back

Common significance levels are 0.05, 0.01, and 0.10.

Front

What does a high Chi Square value indicate about the null hypothesis?

Back

A high Chi Square value suggests that there is a significant difference between observed and expected frequencies, leading to rejection of the null hypothesis.

Front

What is the purpose of the Chi Square test?

Back

The Chi Square test is used to determine if there is a significant association between categorical variables.