[See Steps] Below are speeds (in miles per hour) measured for southbound traffic on 1480 near Cupertino, CA. Assume that this data represents a simple random

Question: Below are speeds (in miles per hour) measured for southbound traffic on 1480 near Cupertino, CA.

Assume that this data represents a simple random sample and the assumption that the standard
deviation of driving speeds is known to be $\sigma $ = 44 to construct a 95% confidence interval for the mean speed.
Construct a 90% confidence interval for the mean speed.

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[See Steps] Below are speeds (in miles per hour) measured for southbound traffic on 1480 near Cupertino, CA. Assume that this data represents a simple random

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