which of the following is true about using th...
which of the following is true about using the phone book to do a study. (alf landon study)\nthe last 4 digits are a good source of random numbers\nthe phone book is convenient\nthe phone book excludes people who do not have a phone.\nall of the above
Answer
# Brief Explanations:
- The last 4 digits of phone - numbers in a phone book can be used as a source of random numbers.
- A phone book is convenient as it is a readily - available list of contacts.
- It only includes people with phones, excluding those without.
# Answer:
D. All of the above