A high school increased the length of the school day from 6.5 to 7.5 hours. Students who wished to attend this high school were required to sign contracts pledging to put forth their best effort on their school work and to obey the school rules; if they did not wish to do so, they could attend another high school in the district. At the end of one year, student performance on statewide tests had increased by ten percentage points over the previous year. Does this improvement prove that a longer school day improves student achievement? No Yes

They must put forth their best effort.
They must obey school rules.
They had the option of going elsewhere. Their attendance at that school was a privilege not a right.
The students were subjected to an attitude that the school had within its walls.

2. Likely the students did so well was because, they had privileges not rights.

fichoh fichoh · Answer 2 · 2021-10-15T20:07:40+02:00

Several factors might have played a role in the improved performance of the students, Hence, even though Longer school day and performance have a positive correlation, it does not prove that it is the cause of the student's improved performance.

In statistics, correlation measures the strength of relationship between variables. However, the fact that two variables are strongly correlated does not infer causation.

Factors such as pledging to obey school rules and putting more effort toward academics could have equally played a role in the performance of the students.

Therefore, it cannot be proved that longer school day was the cause of the student's improved performance.

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