a survey is conducted to determine the most c...
a survey is conducted to determine the most common reason people own a cell phone. a company sent out a survey to customers between the ages of 20 and 30. based on the responses, the company concluded that people own a cell phone for messaging purposes. is this conclusion valid? (1 point)\no yes, because the sample includes all customers between the ages of 20 and 30.\no yes, because the sample includes male and female customers.\no no, because not all people who own a cell phone have the same probability of being selected.\no no, because the sample includes customers of too many different ages.
Answer
# Answer:
C. No, because not all people who own a cell phone have the same probability of being selected.
# Explanation:
## Step1: Analyze sampling bias
The survey only targets customers aged 20 - 30. People outside this age - group who own cell phones have no chance of being selected.
## Step2: Evaluate conclusion validity
A valid conclusion in a survey about all cell - phone owners requires a representative sample. Since the sample is not representative (biased towards 20 - 30 - year - olds), the conclusion that people own a cell phone for messaging purposes is not valid.