In April and May of 2011, the Pew Research Center surveyed cell phone users abou
ID: 2949197 • Letter: I
Question
In April and May of 2011, the Pew Research Center surveyed cell phone users about voice calls and text messaging. They surveyed a random sample of 1914 cell phone users. 75% of the sample use text messaging.
The 95% confidence interval is (73.1%, 76.9%). Which of the following is an appropriate interpretation of the 95% confidence interval?
A. There is a 95% probability that the proportion of all cell phone users who use text messaging is between 73.1% and 76.9%.
B. We can be 95% confident that the proportion of the sample who use text messaging is between 73.1% and 76.9%.
C. 95% of samples will have between 73.1% and 76.9% of respondents who use text messaging.
D. We can be 95% confident that the proportion of all cell phone users who use text messaging is between 73.1% and 76.9%.
Explanation / Answer
Ans:
Option D is correct.
We can be 95% confident that the proportion of all cell phone users who use text messaging is between 73.1% and 76.9%.