Tuesday

September 16, 2014

September 16, 2014

Posted by **whitney** on Sunday, June 3, 2012 at 10:39am.

a) draw a sketch of the reading placement scores for students at this college. be sure to mark the mean and also to mark one and two standard deviations from each side of the mean.

b) 95% of students at this college have a reading placement score between ______ and ______

c) Sammy's reading placement score is 82. What is his z-score?

d) Find the proportion of students at this college who have a reading placement score of at least 82.

e) Elisa's z-score is -1.5. What is her reading placement score?

f) How high does one's reading placement score have to be so that a student is in the 85th percentile?

- statistics -
**PsyDAG**, Sunday, June 3, 2012 at 11:03ama. http://en.wikipedia.org/wiki/Standard_deviation

b. 95% = mean ± 1.96 SD

c. Z = (score-mean)/SD

d. Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion from the Z score, using equation above.

e. Use same equation.

f. Use same table to find Z score and calculate.

**Answer this Question**

**Related Questions**

statistics - Section 5.3: Normal Distributions: Finding Values Answer the ...

statistics - Assume that thermometer readings are normally distributed with a ...

statistics - Scores on the ACT college entrance exam are Normally distributed ...

Analytical Skills - If your score on a statistics exam was 76 and the professor ...

statistics - If scores are normally distributed with a mean of 3.06 and a ...

statistics - If scores are normally distributed with a mean of 3.06 and a ...

statistics, math, college - assume that adults have I.Q scores that are normally...

statistics - SAT scores are normally distributed with a mean of 1518 and a ...

statistics - The average hemoglobin reading for a sample of 20 nurses was 16 ...

statistics - Suppose that the population standard deviation (ó) for a normally ...