Question 1
What is the main purpose of a chi-squared test in statistics?
Question 2
In a chi-squared test, what does the term $\text{observed frequency}$ mean?
Question 3
Which expression is used to calculate the chi-squared test statistic?
Question 4
Why must expected frequencies usually be large enough before using a chi-squared test?
Question 5
In a chi-squared goodness-of-fit test, what is the null hypothesis usually saying?
