Problem 73 of 7
Estimate percentile or area using normal technology for P(X<60) for mean 50 sd 10.
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use normal CDF output.
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Use normal CDF output for less than, greater than, and between.
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Solution
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1. Identify lower and upper bounds.
2. Enter normal CDF with mean and sd or convert to z-scores.
3. Interpret output as probability/percentile area.
Use the worked steps, then substitute the final answer back into the original relationship to confirm it satisfies the prompt.
Using inverse normal when area is requested.