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15 Cards in this Set
- Front
- Back
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Find x from a non-standard normal distribution
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x = mean + (z times the standard distribution)
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Sampling distribution of mean
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Probability distribution of sample means (all samples of same size).
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Biased mean
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the probability distribution has a mean different from the population mean (under or over estimating the mean)
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Target
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the probability distribution acurately reflects the population.
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What is a density curve (or probability density function)?
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A graph of a continuous probability distribution where the total area under the curve must equal 1 and every point on the curve must have a height of 0 or greater.
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What is the standard normal distribution?
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mean = 0 and the standard distribution = 1
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Find the z score of a non-standard normal distribution.
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z = (x - mean) / standard distribution
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sampling distribution of a statistic
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the distribution of all values of the statistic when al possible samples of the same size n are taken from the same population. (The sampleing distribution of a statistic is typically represented as a probability distribution in the format of a table, probability histogram, or formula.)
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sampling distribution of the variance
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the distribution of sample variances, with all samples having the same sample size n taken from the same population.
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sampling distribution of the proportion
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the distribution of sample proportions, with all samples having the same sample size n taken from the same population.
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p^
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sample proportion
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p
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population proportion
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Name the good estimators
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mean, variance, proportion, standard deviation
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Name the bad estimators
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median, range
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standar deviation sub bar x is
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standard deviation / square root n
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