Question

a researcher wants to develop a product for families who have small children. he needs to determine if there is a noticeable interest in a toy that will help children describe their emotions. he asks only a sample of the population to complete his survey. what should be true of the sample so that the results of the survey can be used to predict the results of surveying the population?
the size of the sample should be the same size as the population.
the families included in the sample should represent the families in the population.
the families included in the sample cannot be included in the population.
the size of the sample should be larger than the size of the population.

Explanation:

For survey results to predict population - level results, the sample must be representative. A representative sample has characteristics similar to those of the population. If the sample is not representative, the results may be biased and not applicable to the population.

Answer:

The families included in the sample should represent the families in the population.