Question

Determine the area under the standard normal curve that lies to the left of ​(a) Z= 1.56 (b) Z= 1.05 (c) Z= 1.28 and (d) Z= -1.34.

(a) The area to the left of Z= 1.56 is ___.

Answer 1

ANSWER:

We can find area to the left using excel function: =NORM.S.DIST(Z,TRUE)

Ans a)

P(Z < 1.56) = 0.9406 ans.

Explanation:=NORM.S.DIST(1.56,TRUE) = 0.9406

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Ans b)

P(Z < 1.05) = 0.8531

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Ans c)

P(Z < 1.28) = 0.8997 ans.

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Ans d)

P(Z < -1.34) = 0.0901 ans.

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