Question

The batteries of 150 MP3 players were tested to see if they were

defective. Of those batteries, 20 were defective. Estimate the

The batteries of 150 MP3 players were tested to see if they were


defective. Of those batteries, 20 were defective. Estimate the
the population mean that a battery will be defective

Answer 1

The estimate of the population proportion of defective battery is 0.1333.

Explanation:

Estimate of the population proportion of defective battery:

The estimate of the population proportion is the sample proportion.

Sample proportion:

Number of desired outcomes divided by the number of total outcomes.

Proportion of defective battery:

20 defective out of 150. Thus:

`p = (20)/(150) = 0.1333`

The estimate of the population proportion of defective battery is 0.1333.