Wednesday

July 23, 2014

July 23, 2014

Posted by **tammy** on Sunday, April 29, 2012 at 6:19pm.

a. What is the minimum score needed to be in the bottom 10% of the distribution?

b. What scores form the boundaries for the middle 75% of the distribution.

- statistics -
**PsyDAG**, Monday, April 30, 2012 at 2:29pmZ = (score-mean)/SD

Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion (.10) related to the Z score. Insert values to find score.

Middle 75% = ± .375 between score and mean. Use the same table.

**Related Questions**

statistics - What is the standard deviation of a normal distribution, whose mean...

statistics - A normal distribution has a mean of µ = 100 with standard deviation...

Statistics - Students were given an exam with 300 multiple-choice questions. The...

math - Statistics: Analyze student exam scores Students were given an exam with ...

statistics - 2. Why is it important to know the mean and standard deviation for ...

statistics - The distribution of scores on a standardized aptitude test is ...

math - Students were given an exam with 300 multiple-choice questions. The ...

Stastics - When we convert x-value to z- score and use Standard Normal ...

MATH - Which of the following normal distributions has the smallest spread? A. A...

statistics - A normal distribution has a mean of 20 and a standard deviation of ...