Homework Help: statistics

Posted by Charlie on Sunday, April 3, 2011 at 12:28pm.

Three students take equivalent stress tests. Which is the highest relative score?

a. A score of 144 on a test with a mean of 128 and a standard deviation of 34.
b. A score of 90 on a test with a mean of 86 and a standard deviation of 18.
c. A score of 18 on a test with a mean of 15 and a standard deviation of 5.

statistics - rita, Sunday, April 3, 2011 at 3:06pm
According to a study by Stat & Associates PseudoScientific Consulting, the time interval between Atlantic hurricane of category 4 has a mean of 456 days and a standard deviation of 123 days. Suppose that you observe a sample of five (5) time intervals between successive category 4 hurricanes.
a. On average, what would you expect to be the mean of the five (5) time intervals?

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