Which of the following best describes the approach taken if the expected frequency $e _ { i }$ for any cell i is less than 5?
A) We must choose another sample of five or more observations.
B) We should use the normal distribution instead of the chi-squared distribution.
C) We should combine the cells such that each observed frequency $f _ { i }$ is 5 or more.
D) We must increase the number of degrees of freedom for the test by 5.

Question

Quizplus · Accepted Answer

If the expected frequency for any cell is less than 5, we should combine that cell with another adjacent cell until each observed frequency is at least 5. This is known as the "rule of thumb" for the chi-squared test, as smaller expected frequencies can result in unreliable test results.

Which of the Following Best Describes the Approach Taken If eie _ { i }ei​

Which of the Following Best Describes the Approach Taken If $e _ { i }$