# 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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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).

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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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### Random Variables 