SOLUTION: Determine the area under the standard normal curve that lies to the left of (a)z=1.02 (b)z=1.27 (c)z=-0.86 (d)z=-0.62

Question 930510: Determine the area under the standard normal curve that lies to the left of
(a)z=1.02
(b)z=1.27
(c)z=-0.86
(d)z=-0.62
Answer by ewatrrr(24785) (Show Source): You can put this solution on YOUR website!
the area under the standard normal curve that lies to the left of
Using a TI calculator 0r similarly a Casio fx-115 ES plus
.........
(a)z=1.02 = normalcdf(-100,1.02) = .8461 0r 84.61%
(b)z=1.27 = normalcdf(-100,1.27)= .898
(c)z=-0.86 = normalcdf(-100,-.86)= .195
(d)z=-0.62 = normalcdf(-100,-.62)= .2676
..........
Recommend Using stattrek.com to check Results
until You are familiar with Using Your Calculator.
Excel function: NORMSDIST (z) works as well.
...........
For the normal distribution: Below: z = 0, z = � 1, z= �2 , z= �3 are plotted.
Area under the standard normal curve to the left of the particular z is P(z)
Note: z = 0 (x value: the mean) 50% of the area under the curve is to the left and 50% to the right

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