Question
Asked Nov 26, 2019
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Find the area of the shaded region. The graph to the right depicts IQ scores of adults, and those scores are normally distributed with a mean of 100 and a standard
deviation of 15
Л.
106
128
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Find the area of the shaded region. The graph to the right depicts IQ scores of adults, and those scores are normally distributed with a mean of 100 and a standard deviation of 15 Л. 106 128

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Expert Answer

Step 1

It is given that IQ scores of adults are normally distributed mean 100 and standard deviation 15.

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 100 and standard deviation as 15.
  • Go to shaded area > select X-value and Middle
  • Enter X1 as 106 and X2 as
  • Click OK.
Step 2

Output using MINITAB i...

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Distribution Plot Normal, Mean-100, StDev=15 0.030 0.025 0.020 0.015 0.3136 0.010 0.005 0.000 100 106 128 х Density

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