SOLUTION: Binomial and Normal Distribution
In a certain normal distribution of scores, the mean is 40 and the standard deviation is 4. Find the z-score corresponding to a score of 43. Wha
Algebra ->
Probability-and-statistics
-> SOLUTION: Binomial and Normal Distribution
In a certain normal distribution of scores, the mean is 40 and the standard deviation is 4. Find the z-score corresponding to a score of 43. Wha
Log On
Question 746211: Binomial and Normal Distribution
In a certain normal distribution of scores, the mean is 40 and the standard deviation is 4. Find the z-score corresponding to a score of 43. What percentage of scores were below 43?
Thanks for your help! I just don't understand the formula.
You can put this solution on YOUR website! In a certain normal distribution of scores, the mean is 40 and the standard deviation is 4. Find the z-score corresponding to a score of 43. What percentage of scores were below 43?
----
How far is 43 from the mean?: 43-40 = 3
How many standard deviations is that?: 3/4 of a std.
------
Using the normal distribution model:
P(x < 43) = P(z < 3/4) = 0.773
=================================
Cheers,
Stan H.
==================
(