Homework Help: i need help!!!

Posted by emily on Wednesday, September 10, 2008 at 7:05pm.

probability and statistics

a z score is z = x - xbar divided by s
which is standard deviation
s = 6.36
x = ?
xbar = 54.8
the x is all the data sub. from 54.8 individually which i came up with 1.2 and divided it by 6.36 and the number is .1886.....and the answer in the back of the book is -2.05 so my answer is wrong do you think you could the answer with this information?

statistics - PsyDAG, Thursday, September 11, 2008 at 4:28am
First, it is better to title your post with the subject area, in this case, statistics.

"xbar" = mean

You need either the value for Z or x to solve your equation. From your description, I'm not quite sure what you did.

However, Z = .1886 is very close to the mean, less than a standard deviation away.

I hope this helps. Thanks for asking.

Answer this Question

Related Questions

statistics - The number of accidents per week at a hazardous intersection ...
statistics - The average score of all golfers for a particular course has a mean...
statistics - Consider a sample mean (xbar) of 46 caluclated from a sample of ...
statistics - population with a mean of 53.1 and standard deviation of 4.43 ...
statistics - Three students take equivalent stress tests. Which is the highest ...
statistics - Three students take equivalent stress tests. Which is the highest ...
statistics - consider a sample mean of xbar of 46 calculated from a sample of ...
statistics - What is the probability of 62 if the mean is 60 and the standard ...
statistics - If Z is a standard deviation, find the probability that Z lies ...
statistics - So if a scale has 30 items in it, and if an individual gets a score...

For Further Reading

First Name:
School Subject:
Answer: