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 5% bounds of the sample-to-sample variability?
These are the average of the 5th and 6th items and the average of the 95th and 96th items on the list.
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.