Question
Asked Nov 25, 2019
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Let Z be the standard normal variable. Make a rough sketch of the appropriate region under the standard normal curve. (Do this on paper. Your instructor may ask you to turn in this work.) Find 

P(Z < −0.72).

 (Round your answer to four decimal places.)

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Expert Answer

Step 1

It is given that Z is the standard normal variable. The required probability can be drawn using MINITAB.

Step-by-step procedure to obtain normal probability distribution plot using MINITAB:

  • Go to Graphs > Probability distribution plot > Normal.
  • Enter mean as 0 and standard deviation as 1.
  • Go to shaded area > select left tail and X-value.
  • Enter X value as –0.72.
  • Click OK.
Step 2

Output using MINITAB i...

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Image Transcriptionclose

Distribution Plot Normal, Mean=0, StDev=1 0.4 0.3 0.2 0.1 0.2358 0.0 -0.72 0 Density

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Tagged in

Math

Probability

Random Variables

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