Posted by **sam** on Sunday, August 23, 2009 at 11:45am.

Find the z-score for the given raw score, mean, and standard deviation. Assume a normal probability distribution

score = 15, ì = 16 , and ó = 2

Could you show me how to do this. My instructor has tried but I just don't understand how to do it and I have several questions to answer that are just like this.

- math -
**Marth**, Sunday, August 23, 2009 at 11:52am
z = (x-u)/s, where x is the value, u is the mean, and s is the standard deviation.

You have x = 15, u = 16, and s = 2. z =?

- math -
**sam**, Sunday, August 23, 2009 at 12:01pm
but wouldn't that make it a negative?

- math -
**Marth**, Sunday, August 23, 2009 at 12:03pm
You can have a negative z score.

- math -
**sam**, Sunday, August 23, 2009 at 12:09pm
So anytime it is asking for a z score this is the formula to use? What if it was not normal distribution? Is their another formula?

Thank you for your help. I wish my instructor explained it that easy!

- math -
**Marth**, Sunday, August 23, 2009 at 1:01pm
Z scores are used for finding probabilities with normal distributions.

If you cannot assume the distribution is normal, a z score would not be used.

## Answer This Question

## Related Questions

- math - Find the z-score for the given raw score, mean, and standard deviation. ...
- math - Find the z-score for the given raw score, mean, and standard deviation. ...
- math - Find the z-score for the given raw score, mean, and standard deviation. ...
- math - what is the z-score for the given raw score, mean and standard deviation...
- Math - find the z-scorerelated to the raw score,mean,and standard deviation. ...
- MATH - Find the z-score related to the raw score, mean, and standard deviation ...
- Math - On a test whose distribution is approximately normal with a mean of 50 ...
- math (statistics - John's z-score on a college entrace exam is 1.3. If the raw ...
- Stasistic - On a test whose distribution is approximately normal with a mean of ...
- statistics - So if a depression scale has 30 items in it, and if an individual ...

More Related Questions