Question

A survey conducted in 2000 found that 80% of the population had graduated from high school. A researcher wants to see if that has changed. She randomly selects 500 people from the population. What is the expected frequericy for the "graduated high school" group in the chi-square test

Answer 1

The expected frequency for the "graduated high school" group in the chi-square test can be calculated using the formula: Expected frequency = (Proportion of group in population) x Total sample size.

Step-by-step explanation:

The expected frequency for the "graduated high school" group in the chi-square test can be calculated using the formula:

Expected frequency = (Proportion of group in population) x Total sample size

In this case, the proportion of people who graduated from high school in the population is 80%, and the total sample size is 500. Therefore, the expected frequency for the "graduated high school" group is:

Expected frequency = 0.8 x 500 = 400