Understanding Basic Statistics 6th Edition by Charles Henry Brase,Corrinne Pellillo Brase

Exercise 7

Critical Thinking Alisha wants to do a statistical study to determine how long it takes people to complete a Sudoku puzzle (see Problem 1 for a description of the puzzle). Her plan is as follows:
Download 10 different puzzles from the Internet.
Find 10 friends willing to participate.
Ask each friend to complete one of the puzzles and time him- or herself.
Gather the completion times from each friend.
Describe some of the problems with Alisha's plan for the study. ( Note: Puzzles differ in difficulty, ranging from beginner to very difficult.) Are the results from Alisha's study anecdotal, or do they apply to the general population