Find the indicated area under the curve of the standard normal distribution; then convert it to a percentage and fill in the blank.
About ______% of the area is between Z= -1 and Z= 1 (or within 1 standard deviation of the mean).
As a decimal

A table of the normal distribution will tell you the area between z=0 and z=1 is about 0.34134. The distribution is symmetrical, so there is an equal area between z=-1 and z=0. The total area between z=-1 and z=1 is ...

2×0.34134 = 0.68268 ≈ 0.6827 = 68.27%

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Find the indicated area under the curve of the standard normal​ distribution; then convert it to a percentage and fill in the blank. About​ ______% of the area is between Z= -1 and Z= 1 ​(or within 1 standard deviation of the​ mean). As a decimal

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Find the indicated area under the curve of the standard normal distribution; then convert it to a percentage and fill in the blank.
About ______% of the area is between Z= -1 and Z= 1 (or within 1 standard deviation of the mean).
As a decimal