Question

The weight of male Americans between the ages of 18 and 25 is normally distributed, with a mean of 164.5 lb and a standard deviation of 26 lb. One definition of obesity states that a person is obese if the z-score of his or her weight is greater than 2.

What is the obesity threshold weight for a young adult American male? Round your answer to the nearest tenth.

Answer 1

what is: 164.5 + 2(26) ?

Answer 2

216.5

Answer 3

would that be the answer?

Answer 4

id hope so lol

Answer 5

i tried that but was unsure. Perhaps im doubting something.

Answer 6

thanks Pal!

Answer 7

in this case, 1 zscore = 26

2 zscores above the mean is therefore: mean + 2(26)

Answer 8

hey, do you know hyow to use a z table?

Answer 9

only half of it ;)

Answer 10

i have z = -1.2 and .85

Answer 11

look on the left side for 1.2, and look at the top for .00

where they cross is a value

and again

look on the left side for 0.8, and look at the top for .05

where they cross is another value

Answer 12

do yo have a ztable with you or do you need to look one up on the google?

Answer 13

why 0.5 and 0.8 please justify it

Answer 14

.05 and .8

Answer 15

thats just the way a z table is constructed

Answer 16

to top row represent the .0x value of the z score

the left column represents that n.x value of the zscore

Answer 17

also. i dont have 0.85 on my z table

Answer 18

i know you add the values to get the value that falls in the graph