The Institute of Education Sciences measures the high school dropout rate as the percentage of 20-through 28-year-olds who are not enrolled in school and have not earned a high school credential. Last year, the high school dropout rate was 6.8%. A polling company recently took a survey of 1,900 people between the ages of 20 and 28 and found that 5.2% of them are high school dropouts. The polling company would like to determine whether the dropout rate has decreased. Calculate the value of the test statistic. Multiple Choice 2=-0.9291 O z=-2.7704 O z = 1.664 O Z = 2.071