Statistics - Exam 4
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Probability of rejecting the null hypothesis when in fact the null hypothesis is true | level of significance
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| Denoted by a (alpha) | level of significance
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| If a (alpha) is not given use: | .05
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| _______ is a test or statement about a population parameter such as mean, and it must contain the condition of equality. | null hypothesis
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| ______ is denoted by H0 | null hypothesis
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| _______ is a test or statement about a population parameter and tests for a significant change | alternative hypothesis
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| _______ is denoted by H1 | alternative hypothesis
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| Psychology, education, sociology and athletics are more likely to use a _______ alpha | larger
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| Medical professions and engineering are more likely to use a _______ alpha | smaller
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| Set of values of the test statistic that leads to the rejection of the null hypothesis | critical region
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| Value that separates the critical region from the non-critical region | critical value
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| Value computed from the sample data ; used to determine whether to reject the null hypothesis or not | test statistic
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| Probability of getting a sample statistic (such as the mean) or more extreme value in the direction of the alternative hypothesis when the null hypothesis is true | p-value
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| if p-value is less than or equal to alpha then ________ | reject the null hypothesis
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| if p-value is greater than alpha then ________ | do not reject the null hypothesis
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| A very small p-value indicates a ________ of the null hypothesis | strong rejection
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| complete collection of people, objects, scores, etc. to studied | population
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| any sub collection of data drawn from a population | sample
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| value measuring some characteristic of a population | parameter
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| value measuring some characteristic of a sample | statistic
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| proportion of a population symbol | p
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| mean of a population symbol | µ (mu)
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| variance of a population symbol | σ²
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| standard deviation of a population symbol | σ
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| variance of a sample symbol | s²
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| standard deviation of a sample symbol | s
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| mean of a sample symbol | x bar
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| proportion of a sample symbol | p hat
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| What tells the researcher how confident he or she is with the final conclusion? | p-value
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