SOLUTION: Please I need help in this question because I dont the difference btw thw z and x interval. A high school counselor was given the following z intervals concerning a vocational trai

Algebra ->  Probability-and-statistics -> SOLUTION: Please I need help in this question because I dont the difference btw thw z and x interval. A high school counselor was given the following z intervals concerning a vocational trai      Log On


   

Question 610183: Please I need help in this question because I dont the difference btw thw z and x interval. A high school counselor was given the following z intervals concerning a vocational training aptitude test. The test scores had a mean 450 points and standard deviation 35 points. convert each z interval into an x interval.
a) -1.14 _< z _< 2.27 ( _< = greater than and equal to)
b) z _< -2.58
c) 1.645 _< z
Answer by scott8148(6628) About Me  (Show Source):
You can put this solution on YOUR website!
z is the distance from the mean, measured in standard deviations
___ a z score of 1.5 means a value 1.5 standard deviations greater than the mean

a) 450 + [35(-1.14)] ≤ x ≤ 450 + [35(2.27)]

b) x ≤ 450 + [35(-2.58)]

c is similar to b