The Bright Idea Lighting Company wants to determine what proportion of LED flashlights that come off of its assembly line are defective. A quality engineer takes many samples of
Proportion of defective flashlights in
What is the mean proportion of defective flashlights (as a percentage)?
The sum of the data is
and there are samples.
What are the upper and lower
bounds of the sample-to-sample variability?
These are the average of the
th and th items and the average of the th and th items on the list. and
Predict the proportion of defective flashlights (in percent) in the whole population and give the margin of error.
There is a
different in the upper and lower bounds, therefore we predict of the flashlights will be defective.