Gustavo tested 1000 calculators to see if any were defective. The company claimed that the probability of a defective calculator was 1% per 1000 calculators. Gustavo found 15 defective calculators out of 1000.

What was the predicted frequency?

Predicted Frequency

=(# of trials)(theoretical probability)
=(1000)(0.01)

The predicted frequency was
What was the relative frequency?

Relative Frequency = StartFraction Observed frequency Over Total number of trials EndFraction

The relative frequency was