SCENARIO 15-4
The superintendent of a school district wanted to predict the percentage of students passing a sixth-
grade proficiency test. She obtained the data on percentage of students passing the proficiency test
(% Passing), daily mean of the percentage of students attending class (% Attendance), mean teacher
salary in dollars (Salaries), and instructional spending per pupil in dollars (Spending) of 47 schools in
the state.
-Referring to Scenario 15-4, the null hypothesis should be rejected when testing
whether the quadratic effect of daily average of the percentage of students attending class on
percentage of students passing the proficiency test is significant at a 5% level of significance.

Question

SCENARIO 15-4
The superintendent of a school district wanted to predict the percentage of students passing a sixth-
grade proficiency test. She obtained the data on percentage of students passing the proficiency test
(% Passing), daily mean of the percentage of students attending class (% Attendance), mean teacher
salary in dollars (Salaries), and instructional spending per pupil in dollars (Spending) of 47 schools in
the state. 
-Referring to Scenario 15-4, the null hypothesis should be rejected when testing
whether the quadratic effect of daily average of the percentage of students attending class on
percentage of students passing the proficiency test is significant at a 5% level of significance.

Quizplus · Accepted Answer

The null hypothesis should be rejected if the p-value for the quadratic effect is less than 0.05, indicating that the effect is statistically significant at the 5% level.

SCENARIO 15-4 the Superintendent of a School District Wanted to Predict the Predict