Exam 14: A: Sample Size Determination

A researcher is conferring with a client to do a telephone interview for a particular topic,which the researcher will subcontract to a field services firm for $10 per usable response.The researcher's client wants to be 95.44% confident of the results.Assume the sample proportions formula is appropriate,and that the level of tolerable sample error is 4%.The budget for data collection only offered by the client can be up to but not over $10,000.How many usable responses are needed for the given level of confidence and much will the subcontractor charge the market researcher for sampling? Is the budget for data collection large enough?

If a researcher takes enough samples,the data will begin to approach a normal distribution.

A normal distribution has a total of 6 standard deviations.

When a researcher is not sure if people who responded to the survey are different from those who did not respond,this brings into question the issue of:

Which of the following is not a method for estimating the population standard deviation?

When a research company routinely uses samples of 300 for their studies,they are using which type of plan to determine sample size?

If we were making inferences from a single sample,we would expect that there would be a ____ percent probability that the sample mean or proportion generated from our sample results would be within two standard errors of the true population mean.