Chi - Square Formative 1

Front

What is the shape of the Chi-square distribution?

Back

Skewed right.

Front

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

Back

H₀: the stated distribution is correct.

Front

What does a large χ² test statistic indicate about the p-value?

Back

It is associated with small p-values.

Front

In a chi-square test of goodness of fit, what does a small p-value indicate?

Back

Evidence against the null hypothesis.

Front

What is the formula for degrees of freedom (df) in a Chi-square test?

Back

df = (number of categories - 1).

Front

What is the purpose of a Chi-square test of independence?

Back

To determine if there is a significant association between two categorical variables.

Front

What is the significance level (α) commonly used in hypothesis testing?

Back

0.05 or 5%.

Front

What does a p-value represent in hypothesis testing?

Back

The probability of observing the data, or something more extreme, if the null hypothesis is true.

Front

What is the relationship between the Chi-square statistic and the expected frequencies?

Back

The Chi-square statistic measures how much the observed frequencies deviate from the expected frequencies.

Front

What is the critical value in a Chi-square test?

Back

The value that the Chi-square statistic must exceed to reject the null hypothesis.