Term
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Definition
| Tendency to favor the selection of certain sample elements or events over other sample elements or events |
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Term
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Definition
| Each and every element in the population must have an equal and independent chance of selection. |
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Term
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Definition
| The entire collection of all observations of interest to the researcher |
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Term
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Definition
| Representative portion of the population selected for study |
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Term
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Definition
| Difference between the sample mean and the population mean |
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Term
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Definition
| Any descriptive measure of the entire population. |
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Term
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Definition
| Any descriptive measure of the sample |
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Term
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Definition
| The tendency of the distribution to fall close to a central point or middle point. Examples include arithmetic mean, median, and mode. |
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Term
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Definition
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Term
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Definition
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Term
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Definition
| The value that occurs most often |
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Term
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Definition
| Range, Average Deviation, Variance, Standard Deviation, Percentiles, Quartiles, Deciles, |
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Term
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Definition
| Difference between high and low values |
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Term
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Definition
| Difference between the mean and each of the individual values in the data set. Always zero. First step in determining the variance. |
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Term
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Definition
| The mean of the squared deviations around the mean. Only calculated so we can determine standard deviation. |
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Term
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Definition
| Square root of the variance. Most important. |
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Term
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Definition
| divides the data set into 100 equal pieces |
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Term
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Definition
| divides the data set into 4 equal pieces |
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Term
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Definition
| Inter-Quartile Range the middle fifty-percent of the data set. Difference between the 25th and 75th percentile value |
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Term
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Definition
| Divides data set into 10 equal pieces. |
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Term
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Definition
| Characteristic of the population or sample that is being examined in the statistical study |
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Term
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Definition
| Expressed Numerically - weights, heights, age, etc. |
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Term
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Definition
| Quantitative Variable where values can take on a range of values (usually not whole numbers) |
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Term
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Definition
| Quantitative Variable that is generally expressed in whole numbers. |
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Term
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Definition
| Expressed Non-numerically like gender or religious preference. |
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Term
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Definition
| data set that is unorganized. |
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Term
| Grouped (Frequency Distribution) Data Set |
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Definition
| Data set that is sorted and grouped into classes |
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Term
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Definition
| Section of a Grouped(Frequency Distribution) Data Set |
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Term
| Determine Number of Classes |
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Definition
| 2^C >= N where C is number of classes and N is the number of population observations. 'N' would be 'n' in a sample data set |
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Term
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Definition
| CI = (Largest Value - Smallest Value)/Number of Classes. You have some leeway here |
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Term
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Definition
| Lowest Value of Class + Highest Value of Class divided by 2 |
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