Question 76130: The standard normal table shows an area value of 0.1 for a z-score of 0.25 and an area value of 0.35 for a z-score of 1.04. What percentage of the observations of a random variable that is normally distributed will fall between 0.25 standard deviations below the mean and 1.04 standard deviations above the mean?
a. 25%
b. 35%
c. 45%
d. 55%
Thank You!
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! The standard normal table shows an area value of 0.1 for a z-score of 0.25 and an area value of 0.35 for a z-score of 1.04. What percentage of the observations of a random variable that is normally distributed will fall between 0.25 standard deviations below the mean and 1.04 standard deviations above the mean?
--------
35% of the area is over the interval (0,1.04)
10% of the area is over the interval (0,0,25)
-------
Therefore the area over the interval (0.25,1.04) is 35%-10%=25%
================
Cheers,
Stan H.
|
|
|
