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

An April 15, 2002 report in Time Magazine stated that the average age for women to marry in the United States is now 24.5 years of age. If the standard deviation is assumed to be 4.1 years, find the probability that a random sample of 32 U.S. women would show a mean age at marriage of less than or equal to 22.7 years.

- Statistics -
**MathGuru**, Tuesday, March 5, 2013 at 4:09pm
Use 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.

## Answer this Question

## Related Questions

- tempe - An April 15, 2002 report in Time Magazine stated that the average age ...
- 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 ...
- 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 ...
- statistics - The average age of a vehicle registered in the United States is 8 ...

More Related Questions