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18 Cards in this Set
- Front
- Back
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A population transformed into z-scores has a mean of _____ and a standard deviation of _______.
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0, 1
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Two properties distribution must have to use unit normal table?
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z-scores and normal
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positive z-score -- body is on ____
negative z-score, body is on ______ |
positive - left
negative - right |
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standard error is....
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the standard deviation of distribution of sample means
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as sample size increases, standard error______. why?
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decreases, because denominator of formula increases
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as standard deviation increases, standard error_____. why?
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increases, because numerator of formula increases
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how does sample size affect mean of distribution of sample means?
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it does not
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how does sample size affect shape of distribution of sample means?
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sample size increases, distribution becomes more normal
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z-score is a ratio of...
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distance of particular score from the mean
to average distance from the mean |
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what is random sampling
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-equal probabability of selecting given score
-sampling with replacement |
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symbols for population distribution
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mean = mu
sd = sigma |
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symbols for sample distribution
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mean = M
sd = s |
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symbols for sampling distribution
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mean = mu
sd = sigma sub m |
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standard deviation of distribution of sample means is known as.....
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standard error
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distribution of sample means also known as
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sampling distribution of mean
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one component of central limit theorem?
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as sample size increases, SD of distribution of sample means decreases
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sample of n=36. which distribution is normal?
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distribution of sample means
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null hypothesis
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no change
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