Question

1- Find the area under the standard normal curve between z=0.76
and z=1.90.

Round your answer to four decimal places.

2- Find the area under the standard normal curve between z=-2.49
and z=-0.44.

Round your answer to four decimal places.

3- Find the area under the standard normal curve between z=-2.26
and z=1.88.

Round your answer to four decimal places.

4- Find the area under the standard normal curve to the right of z=2.37.

Round your answer to four decimal places.

5- Let x be a continuous random variable that is normally
distributed with a mean of 65 and a standard deviation of 15. Find
the probability that x assumes a value less than 48.

Round your answer to four decimal places.

Answer #1

1

2

3

4

5.

mu = 65

sd = 15

P(X<48) = P( {x-mu}/sd < {48 - 65}/15 ) = P(Z < -1.33)
= **0.0912**

**again using normal distribution curve
**

**please upvote if the answer helped you**

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