Tuesday

July 29, 2014

July 29, 2014

Posted by **Paul** on Tuesday, March 5, 2013 at 1:52pm.

- Statistics -
**MathGuru**, Tuesday, March 5, 2013 at 4:09pmUse this formula for z-scores:

z = (x - mean)/(sd/√n)

With the data from your problem:

z = (22.7 - 24.5)/(4.1/√32) = ?

Finish the calculation.

Next, look at a z-table to find your probability. Remember that the problem is asking for "less than or equal to" when looking at the table.

I hope this helps.

**Related Questions**

Statistics - An April 15, 2002 report in Time Magazine stated that the average ...

statistics - An April 15, 2002 report in Time Magazine stated that the average ...

statistics - An April 15, 2002 report in Time Magazine stated that the average ...

STATISTICS - An April 15, 2002 report in Time Magazine stated that the average ...

statistics - An April 15, 2002 report in Time Magazine stated that the average ...

statistics - An April 15, 2002 report in Time Magazine stated that the average ...

tempe - An April 15, 2002 report in Time Magazine stated that the average age ...

statistics - the mean age at which men in the united states marry for the first ...

statistics - According to Beautiful Bride magazine, the average age of a groom ...

Math - In a recent year there were the following numbers (in thousands) of ...