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 ____A: 1B: 10C: 100D: 1000What was the relative frequency?Relative Frequency = Observed Frequency/Total Number of Trails The relative frequency was _____A: 0.15%B: 1%C: 1.5% D: 15%
Accepted Solution
A:
We are to find the predicted and relative frequency of the defective calculators.
a) The company claimed that there is 1% probability of defective calculators out of 1000. So predicted frequency = 1% of 1000 = 0.01 x 1000 = 10
b) 15 defective calculators were found in 1000 calculators. Relative Frequency = Observed Frequency / Total Number = 15/1000 x 100% = 1.5%