Question

What is the normal curve area, to the nearest whole percent, between z= -0.38 and z= +1.5?

A. 58%
B. 79%
C. 29%
D. -29%
E. 22%

Answer 1

Please, do you refer to the Gaussian distribution?

Answer 2

normal distribution yea

Answer 3

have you got the table of the "erf" function?

Answer 4

no, i can look it up tho

Answer 5

ok i found one

Answer 6

from the table of the "erf" function, I read that your answer is:
43.32% + 14.8% = 58.12%
Please check that result

Answer 7

hmm i didn't get that i looked up 1.5 and it said .03389

Answer 8

please you have to pick the value of the area between z=0 and z= 1.5 times the satndard deviation sigma

Answer 9

oh now i got it, it was a bad table

Answer 10

here is the table: