Find the area under the standard normal curve to the left of z = 1.25.

Answer 1

You can use normal/area tables, just look up Z = 1.25 and read off the area value.

On a TI-84

2nd vars

normalcdf

lower = -1E99

upper = 1.25 (Z value)

mean = 0

standard deviation = 1

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(This works because in a standard normal with mean = 0, sd = 1, Z=X)