The mean of a normal probability distribution is 460; the standard deviation is 18.about 68% of the observations lie between what two values? about 95% of the observations lie between what two values? practically all of the observations lie between what two values?

As per given , we have

,

i.e. About 68% of the observations lie between ( and )

i.e. About 68% of the observations lie between ( and )

About 68% of the observations lie between 442 and 478.

i.e. About 95% of the observations lie between ( and )

i.e. About 95% of the observations lie between ( and )

About 95% of the observations lie between 424 and 496.

i.e. Practically all of the observations lie between ( and )

i.e. Practically all of the observations lie between ( and )

Practically all of the observations lie between 406 and 514.

a

step-by-step explanation: