SOLUTION: : A set of 50 data values has a mean of 15 and a variance of 25. Find the standard score of a data value = 30.

Question 551048: : A set of 50 data values has a mean of 15 and a variance of 25. Find the standard score of a data value = 30.
Answer by Edwin McCravy(20056) (Show Source): You can put this solution on YOUR website!



z =  where  = 



and where when n > 30, we use the approximation s ≈ .



So in this problem we use  ≈ s =  = 5



z =  =  = 21.21320344.



That's an extremely high z-score but that's what you would 

expect since 30 is so extremely far above the mean of 15.



Edwin  

RELATED QUESTIONS

A set of 50 data values has a mean of 15 and a variance of 25.  Find the standard score... (answered by stanbon)
A set of 50 data values has a mean of 15 and a variance of 25.  Find the standard score... (answered by stanbon)
A set of 50 data values has a mean of 15 and a variance of 36. 

Find the standard... (answered by stanbon)
  A set of 50 data values has a mean of 15 and a variance of 36.  Find the standard score  (answered by solver91311)
A set of 50 data values has a mean of 34 and a variance of 25. 

I. Find the standard... (answered by stanbon)
A set of 50 data values has a mean of 30 and a variance of 4. 
I.  Find the standard... (answered by stanbon)
A set of 50 data values has a mean of 15 and a variance of 36.
I.  Find the standard... (answered by Fombitz)
A set of 50 data values has a mean of 15 and a variance of 36.  Find the standard score... (answered by stanbon)
A set of 50 data values has a mean of 28 and a variance of 4. 
I.  Find the standard... (answered by Fombitz)