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Definition
| Physical representation of the population |
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Definition
| Equal chance of being chosen; chosen independently; all combos possible |
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Definition
| The difference between a sample stat and a population parameter that's just due to chance. As n increases the sampling error decreases. |
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Definition
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Definition
| The sampling distribution of means will have a mean equal to mu and a standard error equal to sd/sq rt of n. Normal distribution. |
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Term
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Definition
| We know how much confidence we can place in our estimate and are trying to guess that the mean of the population is within our interval |
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Term
| level of confidence vs level of precision |
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Definition
| As one increases the other decreases |
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Term
The relationship between a level of confidence, a standard error, and the
interval (centered on x-bar) that probably contains μ |
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Definition
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Term
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Definition
| We use the t-table when the standard deviation (o) is unknown. |
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Term
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Definition
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Term
| What makes a t-curve different from a normal curve? |
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Definition
| It uses degrees of freedom |
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Term
| What is the relationship between confidence and significance? |
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Definition
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Term
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Definition
| Indirect statement of the width of the confidence interval. plus and minus a number. |
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Term
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Definition
| The hypothesis that is tested |
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Term
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Definition
| a hypothesis that stands in opposition if there is a significant difference among three or more groups of samples. |
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Term
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Definition
| Probability of making a type I error |
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Term
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Definition
| A score that has a low probability of occurrence. |
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Term
| region of rejection/critical region |
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Definition
| The test stat (Z) is equal to or falls below the critical value, which in turn allows us to reject the null hypothesis. |
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Term
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Definition
| Number of standard errors away from the mean in the sample. Beginning of the rejection region |
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Term
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Definition
| compare the critical value to the null hypothesis to determine is something is statistically significant |
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Term
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Definition
| The rejection of the null when it is true. Alpha marks the probabilitity of making a type I error |
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Term
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Definition
| Sample that involves cases or subjects that share certain characteristics in common. |
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Term
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Definition
| The difference between two population means (mu). |
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Term
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Definition
| the mean of the differences between two population means |
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Term
| mean of the null distribution in a related-sample design |
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Definition
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Term
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Definition
| The selection of cases/subjects included in one sample has no connection to or influence on the selection of cases/subjects in the other sample |
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Term
| Statistic for analysis in n=1 design |
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Definition
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Term
| Statistic for analysis with mu known and a single x bar |
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Definition
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Term
| Statistic for analysis in a related-samples design |
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Definition
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Term
| Statistic for analysis in an independent-samples design |
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Definition
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Term
| what is the mu of the null distribution of an independent samples design |
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Definition
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Term
| Standard error of the sampling distribution in an independent samples design |
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Definition
| that big formula on the formula sheet |
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Term
| mean difference vs difference of means |
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Definition
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