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11 Cards in this Set
- Front
- Back
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What is the random variable of the sampling distribution of x-bar?
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the sample mean
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Fill in the blank: Central Limit Theorem allows us to compute probabilities on ___________ using the standard Normal table provided the sample size of the random sample is sufficiently large.
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x-bar
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A theoretical sampling distribution of a statistic consists of
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the values of a statistic from all possible samples
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The probability of an event can be defined as
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the fraction of time the event will occur if the random phenomenon is repeated many times.
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On a control chart, under what circumstance is the process out of control?
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- A run of 9 sample means above the centerline or below the centerline - A sample mean below the lower limit - A sample mean above the upper limit
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When its definition, is
you play solitaire, you either win or lose. Therefore, the probability of winning, according to |
approximated by playing lots of times and dividing the number of times you win by the
number of times you play. |
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To detect association between the row and column variables of a two-way table, what do we examine?
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Whether the conditional distribution in every row (or every column) equals the corresponding
marginal distribution. |
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In a three way table, Simpson's paradox occurs whenever
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the direction of association between two variables reverses because the third variable that
interacts strongly with the other two is ignored. |
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Which is the purpose of a residual plot?
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to measure how strong the relationship is between the residuals and the regression equation.
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Which one of the following is NOT affected by outliers?
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Median
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A correlation of r = 0 indicates that
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x and y are not linearly related.
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