Question

For a standard normal distribution, find: P(-1.73 < z < -0.77)

For a standard normal distribution, find: P(z > c) = 0.9494 Find c.

Assume that z-scores are normally distributed with a mean of 0 and a standard deviation of 1.

If P(z>c)=0.2789 P(z>c)=0.2789 , find c

Assume that z-scores are normally distributed with a mean of 0 and a standard deviation of 1. If P(z>d)=0.7887 P(z>d)=0.7887 , find d.

Assume that z-scores are normally distributed with a mean of 0 and a standard deviation of 1. If P(−1.2 c) = 0.2993

For a standard normal distribution, find c ,c if P(z > c) = 0.8016

For a standard normal distribution, find: P(z > c) = 0.8731 Find c.

Answer #1

Q 1) For a standard normal distribution, find: P(-1.73 < z < -0.77)

Q 2) For a standard normal distribution, find: P(z > c) = 0.9494 Find c.

Using Standard Normal table, Since the value of C for the area 0.4494 is -1.64

Answer: c = -1.64

Q 3)

Assume that z-scores are normally distributed with a mean of 0 and a standard deviation of 1.

If P(z>c)=0.2789 , find c

Using Standard Normal table, Since the value of C for the area 0.2211 is 0.586

Aneswer : c = 0.586

Q 4) Assume that z-scores are normally distributed with a mean of 0 and a standard deviation of 1. If P(z>d)=0.7887 , find d.

Using Standard Normal table, Since the value of d for the area 0.2887 is -0.802

Answer: d = -0.802

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