Author Question: A market researcher randomly selects 100 homeowners under 60 years of age and 200 homeowners over 60 ... (Read 139 times)

Shelles · **on:** Jul 24, 2018

A market researcher randomly selects 100 homeowners under 60 years of age and 200 homeowners over 60 years of age. What sampling technique was used?

A) stratified
B) simple random
C) cluster
D) convenience
E) systematic

Question 2

A customer service firm receives an average of three calls per hour on its toll-free number. For any given hour, find the probability that it will receive at least three calls. Use the Poisson distribution.

A) 0.5768 B) 0.1891 C) 0.4232 D) 0.6138