Term
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Definition
| Idea that a distribution of a large 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
| Continuous 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 observations 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 distributions |
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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 series, 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
| 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 particular interval 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; 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
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Definition
| Assumption that sample elements are dream independently. |
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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 or 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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