Determine the area under the standard normal curve that lies to the right of
left parenthesis a right parenthesis Upper Z equals 1.25 comma(a) Z=1.25,
(b)
Upper Z equals negative 0.86 commaZ=−0.86,
(c)
Upper Z equals 0.02 commaZ=0.02,
and (d) Upper Z equals negative 0.78 .Z=−0.78.
Answer
We have to find the area to the rigth of given z values
(A) Using excel function 1- NORMSDIST(z) for right area
setting z = 1.25
this implies
= 1- NORMSDIST(1.25)
= 1- 0.8944
= 0.1056
(B) Using excel function 1- NORMSDIST(z) for right area
setting z = -0.86
this implies
= 1- NORMSDIST(-0.86)
= 1- 0.1949
= 0.8051
(C) Using excel function 1- NORMSDIST(z) for right area
setting z = 0.02
this implies
= 1- NORMSDIST(0.02)
= 1- 0.5080
= 0.4920
(D) Using excel function 1- NORMSDIST(z) for right area
setting z = -0.78
this implies
= 1- NORMSDIST(-0.78)
= 1- 0.2177
= 0.7823
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