Z SCORE math
CJ 301
Assignment #5
Z SCORE
–Please answer each of the following questions. Also, INTERPRET your answers.
You must use the lecture for this week while working on this assignment
– Z score module – under the Learning Modules. (Also, use the Z score table).
*20 points total
YOUR NAME: _______________________________________________
 A state department of corrections has a policy whereby it accepts as correctional officers only those who score in the top 5 % of a qualifying exam. (4 points)
The mean of this test is 80.
Standard deviation is 10.
Would a person with a raw score of 95 be accepted?
(Calculate a Z score: score – mean/st.dev.= )
 Given a normal distribution of raw scores with a mean of 60 and a standard deviation of 10, what proportion of cases fall:

between a raw score of 40 and 80? (3 points)

between a raw score of 45 and 50? (3 points)
 Find the zscore corresponding to a raw score of 90 from a normal distribution with mean 60 and standard deviation 8. (2 points)
 For a normal distribution where the mean is 50 and the standard deviation is 8, what is the area :

Between the scores of 30 and 65? (2 points)
5. Assume that the distribution of a college entrance exam is normal with a mean of 500 and a standard deviation of 100. For each score below, find the equivalent Z score, the percentage of the area above the score, and the percentage of the area below the score. (3 + 3 points)
Score Z score % Area Above % Area Below
a) 375
b) 437
Looking for solution of this Assignment?
WHY CHOOSE US?
We deliver quality original papers 
Our experts write quality original papers using academic databases. 
Free revisions 
We offer our clients multiple free revisions just to ensure you get what you want. 
Discounted prices 
All our prices are discounted which makes it affordable to you. Use code FIRST15 to get your discount 
100% originality 
We deliver papers that are written from scratch to deliver 100% originality. Our papers are free from plagiarism and NO similarity 
Ontime delivery 
We will deliver your paper on time even on short notice or short deadline, overnight essay or even an urgent essay 