Friday

November 28, 2014

November 28, 2014

Posted by **mary** on Monday, February 1, 2010 at 5:32pm.

One day it took Eric 21 minutes to get to work. You would use the formula for transforming a raw score in a sample into a z-score to determine how many standard deviations the raw score represents.

Since his "score" is 21, you would subtract the mean of 17 from 21 and divide that result (4) by the standard deviation of 3.

The z-score of 1.33 tells you that Eric’s time to get to work is 1.33 standard deviations from the mean. Another day, it took Eric only 12 minutes to get to work. Using the same formula, determine the z value. Is it positive or negative? Explain why it should be positive or negative

- psy -
**bobpursley**, Monday, February 1, 2010 at 5:36pmWhat happens when you subtract 21 from 13?

- psy -
**mary**, Monday, February 1, 2010 at 8:55pmI do not understand your answer to my question

**Answer this Question**

**Related Questions**

statistics - Eric has computed that it takes an average (mean) of 17 minutes ...

psy - Please help, very lost Eric has computed that it takes an average (mean) ...

psycholgy - Please help, very lost Eric has computed that it takes an average (...

Statistics - Eric has computed that it takes an average (mean) of 17 minutes ...

Mathamatics - A walk up a hill starts at a car park on the 100m contour and ...

statistics - Times for a surgical procedure are normally distributed. There are ...

6th grade math - Mya works on Saturdays and then attends a study group. She ...

statistics - John drives to work each morning and the trip takes an average of...

Statistics - John drives to work each morning and the trip takes an average of m...

Statistics - a laptop manufacturer finds that the average time it takes an ...