Question

17)Draw the standard normal distribution. Shade the area to the between of -2.68 and 1.49. Find...

17)Draw the standard normal distribution. Shade the area to the between of -2.68 and 1.49. Find the shaded area.

18)Draw the standard normal distribution. Shade the area to the left of the z-score is 0.907. Find the z-score.

Math   Statistics-And-Probability   
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Homework Answers

Answer #1

Solution:

Shade area

= P( between of -2.68 and 1.49)

= P[-2.68 < Z < 1.49]

= P(Z < 1.49) - P(Z < -2.68)

= 0.9319 - 0.0037

= 0.9282

Answer : shaded area. = 0.9282

18)

Given that , P(Z < z score ) = 0.907

Use z table , see where is probability 0.907 and then see the corresponding z value .

So , P(z < 1.32) = 0.907 approximately

So , required z score is 1.32

required z score is 1.32

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