A Random Sample of 45 Door-To-Door Encyclopedia Salespersons Were Asked

question 31

Short Answer

A random sample of 45 door-to-door encyclopedia salespersons were asked how long on average they were able to talk to the potential customer. Their answers revealed a mean of 8.5 minutes with a variance of 9 minutes.
Give a point estimate in minutes for the average conversation length.
______________
Give the margin of error.
______________

---

Definitions:

Table Design View

The interface in database management systems where users can define, modify, and view the structure of a database table.

Relates

Describes the connection or association between two entities, typically within a database or a logical structure.

Indexed

A method of storing data in a database in such a way that it improves the speed of data retrieval operations on a database table.

Database Performance

The measure of how efficiently and effectively a database system processes queries, updates, and other operations.