A random sample of 120 fifth grade students took a standardi

A random sample of 120 fifth grade students took a standardized reading test and 100 of them (83.3%) met the minimum requirement of reading proficiency for the grade level. Their English teacher is interested to see if this rate is significantly higher than the national average, which is 65%. Which of the following tests would you recommend?

One-sample test for proportions

Two-sample test for proportions

One-sample test for means

Two-sample test for means

Solution

As we are comparing proportions here (percentages), then it has to be a test for proportions.

However, since we only have one sample to be compared to the national average, then it has to be

OPTION A: One-sample test for proportions [ANSWER, A]