Chapter 8.1, Problem 20E

To determine

Check which of theinference condition is violated.

Answer to Problem 20E

Hence, the condition of random is violated thus the confidence interval is worthless.

Explanation of Solution

The inference conditions are Random, Normal and Independent.

Since the response are taken from online poll which is a voluntary response not a random sample. Thus, the condition of random is violated.

To construct a confidence interval it is important to follow all the three inference conditions. Since it does not follow the condition of random.

Hence, the condition of random is violated thus confidence interval is worthless.