Homework Time Marginal Return Calculator

Model the relationship between daily homework time and academic outcomes using Cooper et al. meta-analytic findings. Shows diminishing returns by grade level: positive effects in high school (d = 0.60), negligible for primary school (d = 0.10).

Data set — comma or newline separated
Statistical Results — n = 8
Count (n)8
Sum (Σx)40
Min2
Max9
Range7
Q14
Q35.5
IQR1.5
Mean (μ)5
Median4.5
Mode4
Pop. Variance (σ²)4
Pop. Std Dev (σ)2
Sample Variance (s²)4.571428571
Sample Std Dev (s)2.138089935
Skewness0.65625
Excess Kurtosis-0.21875
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How It Works

Model the relationship between daily homework time and academic outcomes using Cooper et al. meta-analytic findings. Shows diminishing returns by grade level: positive effects in high school (d = 0.60), negligible for primary school (d = 0.10)

Each component has a specific meaning:

  • Cooper et al — The cooper et al recorded for the scenario being assessed.

Note: Interpret the homework roi result against the thresholds and context described above.

How to Use

Enter the Cooper et al for the scenario you are assessing. Model the relationship between daily homework time and academic outcomes using Cooper et al. meta-analytic findings. Shows diminishing returns by grade level: positive effects in high school (d = 0.60), negligible for primary school (d = 0.10). Use the homework roi result to inform your calculation.

Frequently Asked Questions