Thursday

October 30, 2014

October 30, 2014

Posted by **kevin** on Sunday, March 28, 2010 at 7:51pm.

(a) What percent of students earned a score between 50% and 70%?

(b) If 60 students took the exam, how many got a score between 50% and 70%?

- math -
**PsyDAG**, Monday, March 29, 2010 at 12:21pmZ = (x - μ)/SD

Z = (x -50)/10

a) Get the respective Z scores. Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion between the two Z scores.

b) Multiply the proportion above by 60.

**Answer this Question**

**Related Questions**

statistics-math - The mean score on a Math exam was 50% and the standard ...

statistics - For a particular sample of 50 scores on a psychology exam, the ...

stats - 2. A standardized exam was provided to all 3rd graders in Arizona ...

Stats - For a particular sample of 63 scores on a psychology exam, the following...

Stats - For a particular sample of 63 scores on a psychology exam, the following...

statistics - For a particular sample of 53 scores on a psychology exam, the ...

Can somehelp me with this ASAP plz?!?!?! Stats - For a particular sample of 63 ...

Stats - For a particular sample of 63 scores on a psychology exam, the following...

statistics - For a particular sample of 63 scores on a psychology exam, the ...

statistics - For a particular sample of 80 scores on a psychology exam, the ...