Term
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Definition
| Idea that a distribution of a larger number of sample means or sample proportions will approximate a normal distribution, regardless of the distribution of the population from which they were drawn. |
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Term
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Definition
| Continous distribution that is bell-shaped and symmetric about the mean; the mean, median, and mode are equal. |
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Term
| Proportional Property of the Normal Distribution |
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Definition
| Feature that the number of obserbations falling between the mean and a given number of standard deviations from the mean is the same for all normal distributions. |
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Term
| Standard Normal Distribution |
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Definition
| Normal distribution with a mean of zero and a standard deviation of one. |
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Term
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Definition
| Measure of dispersion calculated by subtracting the mean of the series from each value in a seris, squaring each result, summing the results, dividing the sum by the number of items minus 1, and taking the square root of this value. |
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Term
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Definition
| Frequency distribution of all the elements of a population. |
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Term
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Definition
| Frequency distribution of all the elements of an individual sample. |
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Term
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Definition
| Frequency distribution of all the elements of an individual sample. |
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Term
| Sampling Distribution of the Mean |
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Definition
| Theoretical frequency distribution of the means of all possible samples of a given size drawn from a particular population; it is normally distributed. |
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Term
| Standard error of the Mean |
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Definition
| Standard deviation of a distribution of sample means. |
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Term
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Definition
| Particular estimate of a population value. |
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Term
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Definition
| Interval or range of values within which the true population value is estimated to fall. |
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Term
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Definition
| Probability that a particularinterval will include the true population value; also called confidence coefficient. |
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Term
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Definition
| Interval that, at the specified confidence level, includes the true population value. |
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Term
| Sampling Distribution of the Proportion |
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Definition
| Relative frequency distribution of the sample proportions of many random samples of a given size drawn from a particular population; it is normally distributed. |
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Term
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Definition
| Amount of sampling error the researcher is willing to accept. |
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Term
| Population Standard Deviation |
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Definition
| Standard deviation of a variable for the entire population. |
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Term
| Finite Population Correction Factor (FPC) |
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Definition
| Adjustment to the required sample size that is made in cases where the sample is expected to be equal to 5 percent of more of the total population. |
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Term
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Definition
| Probability of not making a type II error. |
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