What sample sizes are necessary at population sizes of 1 billion, 10,000, and 100 with a confidence interval of 5 and a 95 percent confidence level? Explain the effect population size has on sample size.
Have you ever been disappointed because a television network cancelled one of your favorite television shows because of “low ratings”? The network didn’t ask your opinion, did it? It probably didn’t ask any of your friends, either. That’s because estimates of television audience sizes are based on research done by the Nielsen Company, which uses a sample of 9,000 households out of the more than 113 million households in the United States to determine national ratings for television programs. That doesn’t seem like enough, does it? As it turns out, statistically, it’s significantly more than enough.