Question

Help ? Medal and fan!!

In a medical study, the heights of a group of men were measured to the nearest inch. There were 120 men with heights of 60–64 inches, 280 men with heights of 65–69 inches, 312 men with heights of 70–74 inches, and 162 men with heights of 75–79 inches.

Which probability distribution table best reflects the data?

Answer 1

What's the total of men in the sample? What proportion of this makes up each category? (Each \(P\) value is given by \(\dfrac{\text{number of men in height range}}{\text{total number of men}}\))

Answer 2

to get the total men wouldn't you have to add 120 , 280 , 312, and 162 right ?

Answer 3

@HolsterEmission

Answer 4

yes, first add up to get the total number of men. what do you get ?

Answer 5

then find the fraction of men in the first group.
that means find 120/total

(change to a decimal... a calculator is useful). what number do you get ?

Answer 6

i got 1274

Answer 7

did you add up
120 , 280 , 312, and 162
?
if we rounded that to 100+300+300+200 that is 900. the answer should be near 900
try again.

Answer 8

okay this time i got 874

Answer 9

yes, that looks better

now find the fraction in the first group. can you do that ?

Answer 10

uhh how do you do that ..?

Answer 11

you find the ratio of number of men in the first group compared to the total number

120/total

Answer 12

ooh so it would be 120/874 ?

Answer 13

yes, but use a calculator to make it a decimal (so we can compare it to the answer choices)

Answer 14

0.13 ??

Answer 15

I would use more decimals

Answer 16

or wait it would be 0.137 my bad

Answer 17

it looks like only 1 choice has that number so that is probably the answer
we could check the 2nd group, 280/874
just to be sure.

Answer 18

and by dividing that you would get 0.320 so the answer would have to be C

Answer 19

yes.