Term
| A process by which decisions are made concerning the values of parameters |
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Definition
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Term
| The probability with which we are willing to reject the Ho when it is in fact correct |
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Definition
Rejection level (significance level)
α=.05 |
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Term
| A set of outcomes of an experiment that will lead to rejection of Ho |
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Definition
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Term
| The results of a statistical test |
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Definition
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Term
| The value of a test statistic at or beyond which we will reject the Ho |
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Definition
| Critical Value (use tables z or t) |
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Term
| The number of independent pieces of information remaining after estimating one or more parameters |
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Definition
Degrees of freedom
df=n-1 |
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Term
| The hypothesis that the experiment was designed to investigate |
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Definition
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Term
| The statistical hypothesis tested by the statistical procedure; usually a hypothesis of no difference or no relationship |
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Definition
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Term
| The hypothesis that is adopted when Ho is rejected; usually the same as the research hypothesis |
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Definition
| Alternative hypothesis (H1) |
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Term
| A test that rejects extreme outcomes in only one specified tail of the distribution |
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Definition
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Term
| Predicts which direction in which an individual will differ from the mean; rejection region is located in only one tail of the distribution |
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Definition
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Term
| A test that rejects extreme outcomes in either tail of the distribution |
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Definition
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Term
| More common because investigators often want to make sure they include all possible outcomes |
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Definition
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Term
| The most basic concept underlying all statistical tests |
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Definition
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Term
| The distribution of a statistic over repeated sampling from a specified population |
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Definition
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Term
| The standard deviation of a sampling distribution |
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Definition
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Term
| The distribution of sample means over repeated sampling from one population |
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Definition
| Sampling distribution of the mean |
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Term
| What must the sampling size be in order to approximate a normal distribution in a markedly skewed sample? |
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Definition
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Term
| The rate at which the sampling distribution of the mean approaches normal is a function of the shape of the parent population |
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Definition
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Term
| When μ and σ are known, what type of test do we conduct? |
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Definition
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Term
| When σ is unknown and it is estimated by using the sample standard deviation (s) what type of test is this? |
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Definition
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Term
| As μ1-μ0 increases; likelihood of rejection does what? |
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Definition
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Term
| As you increase n (sample size) likelihood of rejection does what? |
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Definition
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Term
| If you increase s (variability) your likelihood of rejection does what? |
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Definition
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Term
| If you go from alpha .05 to alpha .01 your likelihood of rejection does what? |
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Definition
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Term
| If you go from a 1 tail to a 2 tail, likelihood of rejection does what? |
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Definition
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Term
| When the results of he study show one thing but its not whats truly going on |
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Definition
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Term
Error of rejecting null when it is true
ex. test positive for strep but you do not have it
jury finds you guilty but you are innocent |
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Definition
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Term
The error of not rejecting null when it is false
ex. Doctor says nothing is wrong, person has something wrong
Jury finds defendent innocent but they are guilty
Test clean for drugs but you are taking them |
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Definition
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Term
| The probability of a type 1 error |
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Definition
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Term
| The probability of a type 2 error |
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Definition
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Term
The probability of correctly rejecting a false null
ex. jury finds you guilty and you are guilty
doctor says you have strep and you have strep |
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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
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Term
| A range of values within which we are reasonably certain the population mean lies |
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Definition
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