Exam 14: Sample Size Determination

What type of property of the normal distribution states that,for any population,the Distribution of sample means approaches a normal distribution as sample size increases?

If the mean of a set of scores equals 4,what is the z-score for a score of 2 if the standard Deviation of the scores equals 0.5?

All of the following are properties of the normal distribution EXCEPT:

The size of the population under study is an important part of the formulas for determining the sample size for a study.

The budget for a research project frequently is a major factor in setting the sample size for the research study.

The standard error of the mean equals the:

If z = 1.96,the standard deviation is 2.5,and the error is plus or minus $0.50,what is the Approximate sample size needed for this study?

The range of values within which the population mean is expected to fall is called the:

The formula for a z-score equals the score ______ the ________ ,and then ________ the Standard deviation of the variable.

If the standard deviation is 12 and the sample size is 144,what is the standard error of the Mean?

If z = 1.96,the standard deviation is 4.5,and the error is plus or minus $1.75,what is the Approximate sample size needed for this study?

The normal distribution is symmetric about the mean.

The probability of not making a Type II error is called statistical power.

In probability samples,the cost of increasing sample size rises on a linear basis.

If the sample size is greater than 40,and the researcher wants to be 95 percent confident that the population mean lies somewhere in a confidence interval,the population mean will be somewhere between the sample mean ________ 1.96 ________ the ________ .

If z = 1.96,the standard deviation is 3.5,and the error is plus or minus $0.25,what is the Approximate sample size needed for this study?

The standard normal distribution has a mean of ________ and a standard deviation of ________.

In selecting probability samples,the general relationship is that the ________ the sample Size,the ________ the sampling error.

If the sample size is 25 and the standard deviation is 5,what is the standard error of the Mean?

In selecting probability samples,sampling error ________ at a rate equal to the _______ of the relative _______ in sample size.