SOLUTION: Imagine that there is an achievement test for which the mean is 50 and the standard deviation is 10. What is the probability of getting a score of 62 or less, or p(X<62)? Use the t
Algebra ->
Probability-and-statistics
-> SOLUTION: Imagine that there is an achievement test for which the mean is 50 and the standard deviation is 10. What is the probability of getting a score of 62 or less, or p(X<62)? Use the t
Log On
Question 889974: Imagine that there is an achievement test for which the mean is 50 and the standard deviation is 10. What is the probability of getting a score of 62 or less, or p(X<62)? Use the table on page 699. Show your work. Answer by rothauserc(4718) (Show Source):
You can put this solution on YOUR website! We need to calculate the z-value for p(X<62)
z-value is calculated as (X-mean)/std.dev
z-value = (62 - 50) / 10 = 1.2
now we can find the probability associated with the z-value of 1.2 by consulting the table of z-values
P(X<62) = 0.8461
