SOLUTION: in a sample distribution, x=56 corresponds to z= 1 and x=47 corresponds to z= -0.50. Find the mean and standard deviation for the sample
Algebra.Com
Question 1085086: in a sample distribution, x=56 corresponds to z= 1 and x=47 corresponds to z= -0.50. Find the mean and standard deviation for the sample
Answer by Boreal(15235) (Show Source): You can put this solution on YOUR website!
z=1=(56-mean)/sd
z=-0.5=(47-mean)/sd
1sd=56-mean
-0.5 sd=47-mean
0.5 sd=-47+mean
1.5 sd=9
sd=6
substitute into the first
1=(56-mean)/6
6=56-mean
mean=50
mean 50 and sd 6
RELATED QUESTIONS
in a distribution of scores, X = 64 corresponds to z = 1, and X = 67 corresponds to z =... (answered by ewatrrr)
In a population distribution, a score of X = 28 corresponds to a z = -6.00 and a score of (answered by ikleyn)
in a population distribution, a score of x=28 corresponds to z=-1 and a score of x=34... (answered by Fombitz)
For a sample with a mean of M = 50 and a standard deviation of s = 10, a z-score of z =... (answered by Theo)
in a population of exam scores, a score of x=48 corresponds to z=+1.00 and a score of... (answered by stanbon)
The scores on a mathematics exam have a mean of 75 and a standard deviation of 6. Find... (answered by solver91311)
The score on a mathematics exam have a mean of 70 and a standard deviation of 8. Find the (answered by Boreal)
In a population of exam scores, a score of X=28 correspond to z= -1.00, and a score of... (answered by Boreal)
A population of scores has a mean of 42.In this population, and X value of 40 corresponds (answered by Fombitz)