A Quality Inspector Tested 41 Copiers in an Attempt to Estimate

question 34

Essay

A quality inspector tested 41 copiers in an attempt to estimate the average failure rate of
the copier model. His study indicated that the number of failures decreased from two
years ago, indicating an increase in the reliability of the copiers. Describe the variable of
interest to the inspector.

---

Definitions:

Statistics

The science of collecting, analyzing, interpreting, and presenting data to make informed decisions or predictions.

Mean

In statistics, the average value of a set of numbers, calculated by dividing the sum of all values by the count of values.

Median

is a statistical measure indicating the middle value in a set of data when arranged in numerical order, effectively dividing the dataset into two halves.

Rate

A measure or quantity across a specific time frame, commonly used to calculate speed, frequency, or incidence.