Basic Statistics Question

label Statistics
account_circle Unassigned
schedule 1 Day
account_balance_wallet $5

How do I solve the following: In a normal distribution with a mean of 180 and a standard deviation of 30, what raw score falls at the 60th percentile (or P.60)?

May 11th, 2015

We look on the Z chart for P=0.60.  According to the Z chart, it gives a Z value of 0.25

So it's 0.25 standard deviations above the mean:

(0.25)(30) = 7.5

Therefore, the raw score is 180 + 7.5 = 187.5

May 11th, 2015

When I find the Z value of 0.60 on the chart, it says 0.2257 next to it (area between mean and z). Am I misunderstanding how to read the chart?

May 11th, 2015

yes, you are reading it wrong.  the z value only has 2 significant numbers. In this case it is 0.25

May 11th, 2015

Studypool's Notebank makes it easy to buy and sell old notes, study guides, reviews, etc.
Click to visit
The Notebank
...
May 11th, 2015
...
May 11th, 2015
Sep 26th, 2017
check_circle
Mark as Final Answer
check_circle
Unmark as Final Answer
check_circle
Final Answer

Secure Information

Content will be erased after question is completed.

check_circle
Final Answer