find area under st-normal dist. curve to left of z=-2.15,

don't know how to do this, please help...

find the area under the standard normal distribution curve of;

to the left of z= -2.15 and to the right of z= 1.62=

i see how to do the other types i did, but i can't get how to set this up...ty!

Re: don't know how to do this, please help...

MRS.FREE said:

find the area under the standard normal distribution curve of;

to the left of z= -2.15 and to the right of z= 1.62=

i see how to do the other types i did, but i can't get how to set this up...ty!

Click to expand...

Draw a rough sketch

Draw the limit lines (roughly)

Draw the symmetry line.

Now calculate areas and add.

Re: don't know how to do this, please help...

like this???

-2.15= .0158
1.62= .9474 (1.000-.9474=.0526)
.0526+.0158= .0684


i think im wrong, am i?