The mean of a certain random variable, X, is 41 and the standard deviation is 1.3....

Question

Question

The mean of a certain random variable, X, is 41 and the standard deviation is 1.3.

Find P(X>51) by using normalcdf without converting to z-scores.
Find P(X>51) by converting to z-scores and then using normalcdf
Compare your answers. Is it necessary or useful to convert to z-scores when using the TI calculator to find probabilities?

Answer 1

Answer #1

Answer 2

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