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Mathematics 15 Online
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.

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):

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