Which is bigger, standard deviation or standard error of ¯x?
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True or false: Predictions made using a least-squares regression line have errors.
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True or false: The value for the predicted tree volume, , when tree diameter X = 11 is computed as ˆy=−36.946(11)+5.066.
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Which of the following does ˆy estimate?
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True or false: The error on the prediction of the mean board feet of all trees is the same as the error on the prediction of the volume of wood in board feet of a particular tree.
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Which interval estimates the mean volume of wood for all trees with sixteen inch diameters?
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Fill in the blank: A prediction interval for an individual is ____________________ a confidence interval for a mean.
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What is ˆy called in the Minitab output?
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True or false: All confidence intervals have the form: “estimate” ± “table value” times “S.E. of estimate”.
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What table is used to find the “table value” for a confidence interval for the mean, μY.
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What is the name of s√1n, the part of the formula highlighted in pink?
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What is estimated with the interval (42.02, 46.20)?
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For this example, what is the margin of error of the prediction?
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True or false: A prediction made using an x value close to ¯x is more accurate than a prediction made using an x value that is far from ¯x.
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True or false: ˆy estimates the volume of wood for one particular tree having sixteen inch diameter whereas ¯y estimates the mean board feet for all trees with sixteen inch diameter.
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True or false: The estimate used in a prediction interval for an individual is the same as the estimate used in the confidence interval for the mean.
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What is the name of "s√1", that portion of the formula highlighted in pink?
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What does the interval (35.17, 53.05) estimate?
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Which interval is wider?
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Fill in the blank: A confidence interval for the mean based on standard error of ¯x is _____________ a prediction interval for an individual based on standard deviation.
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