Chapter 9.3, Problem 106E

To determine

To find : best answer for given statement “The most important condition for sound conclusions from statistical inference is that”

Answer to Problem 106E

Option (a) is correct that is the data come from a random sample.

Explanation of Solution

Given information :

1. The data come from a random sample.
2. The population distribution is exactly normal.
3. The data contain no outliners.
4. The sample size si less than $10\%$ of the population size.
5. The sample size is at least $30$ .

The best answer for the given statement is “The data come from a well-designed random sample or randomized experiment”

So the correct option is (a).