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OpenStudy (anonymous):
The 90% confidence interval for the mean one-way commuting time in New York City is 37.8 < μ < 38.8 minutes. Construct a 95% interval based on the same data. Which interval provides more information.
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OpenStudy (amistre64):
pull off the zscore from the 90 to find your sd
OpenStudy (anonymous):
My book never came with a zscore
OpenStudy (amistre64):
you are doing confidence intervals which means the zscore was discussed many many chapters ago
OpenStudy (amistre64):
which score is attributed to 90% about the mean?
OpenStudy (amistre64):
|dw:1334930127032:dw|
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