Jacki is conducting a study that examines the effects of multi-vitamins on common cold symptoms. She hopes to generalize her findings to the school-age population of children in a specified region in her state. The population of children is 9,000. She is going to conduct a survey and decides to sample 7000 children. Regarding Jacki's sample we know that
A) it is substantially too small.
B) it is not representative.
C) it will result in large sampling bias.
D) it is substantially too big.

Question

Quizplus · Accepted Answer

Jacki's sample size of 7000 children is actually quite large given the population size of 9000 children. A sample size of around 385 would be sufficient to achieve a representative sample (assuming a margin of error of 5% and a 95% confidence level). A larger sample size may result in more accurate and precise estimates, but it is not substantially too big. Therefore, option D is the best choice.

Jacki Is Conducting a Study That Examines the Effects of Multi-Vitamins