For a normal curve with mean 7 and standard deviation 4, which of

the following parts of the normal curve will have an area of

approximately 68%?

from 5 to 9

from 3 to 11

from 7 to 15

from -1 to 15

the following parts of the normal curve will have an area of

approximately 68%?

from 5 to 9

from 3 to 11

from 7 to 15

from -1 to 15

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