Assign What conditions must n satisfy to make the test valid? Dates UN HW & T + Choose the correct answer below. Lecture HW Vid O A. n must be large enough so that for every cell the expected cell count will be equal to 10 or more. OB. n must be large enough so that for every cell the expected cell count will be equal to 5 or more. O C. n must be equal to 10 or more. OD. n must be equal to 5 or more. Power Grades grades & tests

For the chi-squared test to be valid, the expected cell count rule must be satisfied. This means that for every cell in the contingency table, the expected cell count should be equal to 10 or more. The expected cell count is calculated by taking the row total, multiplying it by the column total, and dividing by the sample size.

Why is this rule important? If the expected cell counts are too small, the chi-squared test may not accurately reflect the true relationship between the variables being tested. This can lead to incorrect conclusions, such as failing to detect a significant association when one actually exists (a type II error) or concluding that an association exists when it does not (a type I error).

In addition to the expected cell count rule, other assumptions of the chi-squared test include independence of observations, random sampling, and categorical data that are nominal or ordinal in nature. Violations of these assumptions can also lead to biased or inaccurate results.

Therefore, it is important to carefully consider the assumptions of the chi-squared test before applying it to data and to ensure that these assumptions are met. If the assumptions are not met, alternative methods of analysis may need to be used.

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