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18 Cards in this Set
- Front
- Back
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Normal Distribution |
A family of symmetrical curves that extent infinitely in either direction from the peak. |
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Discrete Probability Distribution |
Distribution with countable or finite number of possible values. |
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Continuous Probability Distribution |
Distribution that allows us to measure a variable to whatever degree of precision is required. |
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Infinite Population |
A population with an unlimited number of members. |
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Sampling Distribution of Means |
Distribution of arithmetic means of all the possible random samples of size n that could be selected from a given population |
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Standard Error of the Mean |
The standard deviation of the sampling distribution of sample means and is represented by the symbol (sigma w/ xbar next to it) |
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Standard Error of Percentage |
The standard deviation of the sampling distribution of sample percentages and is represented by the symbol (sigma w/ p next to it) |
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Estimate |
A specific value or quantity obtained for a statistic |
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Estimator |
Any statistic that is used to estimate a parameter. |
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Unbiased Estimator |
Estimator whose sampling distribution has a mean (expected value) that's equal to the population parameter to be estimated. |
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Estimation |
The entire process of using an estimator to produce an estimate of the parameter |
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Point Estimate |
Single number used to estimate a population parameter, and the process of estimating with a single number is known as a point estimation. |
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Interval Estimate |
A spread of values used to estimate a population parameter |
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Confidence Coefficient |
The probability of correctly including the population parameter being estimated in the interval that is produced. (1 - "alpha") |
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Confidence Intervals |
Interval estimates based on specific confidence levels, and the upper and lower limits of the intervals are known as confidence limits. |
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Alternative Hypothesis |
The conclusion that is accepted if the null hypothesis is rejected. |
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Test statistic |
Sample statistic whose value is the basis of the hypothesis-testing decision. |
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Decision rule |
A formal statement that clearly states the appropriate conclusion to be reached about the null hypothesis based on the value of the test statistic. |
