Question

Please help me :( I will give you a super shiny medal! :)

Answer 1

It deals with the z-score, b is incorrect, I'm not sure what I did wrong :(

Answer 2

so I know that the z score formula is: \[Population z-score: z=\frac{ x-\mu }{ \sigma }\]

Answer 3

May I just point out something from the passage:

Answer 4

First of all you should summarize the given information:
32-35 weeks, m=2800gr, SD= 600gr
40> , m= 3400gr, SD= 440 gr
then you should compare a 34 weak baby who is 3250 gr with a 41 weeks baby with 3850 gr. In this regard, you have to subtract the weights from the the mean of the group they are belonged to. the 34 weeks baby belongs to the first group, so we have
3250-2800= 450
and
3850-3400=450
so you see that the differences are the same! therefore, you can compare them by dividing each 450 to the SD, which is for the first group 450/600= 0.72 and for the second group 450/440= 1.0227.
So, choice C is the best answer.

Answer 5

for the 32 weeks, I did 2950 - 2500 = 450/700 =0.64

Answer 6

It seems to me that the 32 weeks would be relatively more.

Answer 7

Some lovely copy and paste skills. @mitu12

Answer 8

Also, what I stated was just an assumption based on the means, does not it is particularly correct.

Answer 9

does not mean*

Answer 10

For 32 weeks: "a 32-week gestation period baby weighs 2950 grams" Therefore makes it the x, right? so it's 2950 - 2500 = 450 / 700 = 0.64.

For 40 weeks: "40​-week gestation period baby weighs 3250​ grams" So it's
3250 - 2800= 450 / 360 = 1.25?

Wouldn't it natural-score is positive, it would indicate that the data value is above the mean?.. :(

Answer 11

Is my math correct? Or is my reasoning wrong? I'm not sure :c

Answer 12

I mean that logically makes sense, but it may just be the wrong values.

Answer 13

Isn't 1.25 larger than .64?

Answer 14

wait, I'm looking at the question problem that I chose... oops. B had worded it as: 40 weeks is larger because it's value is SMALLER than 30 weeks... oops, mitu was right, it was C, I read the answers wrong. oops.

Answer 15

Yes, it is C. Mitu copied and pasted from yahoo answers. :/

Answer 16

C. The baby born in week 40 weighs relatively more

since its​ z-score, 1.25 is larger

than the​ z-score of 0.64

for the baby born in week 32


oopsies.

Answer 17

it was from yahoo? :0

Answer 18

I already knew it was C, but what he pasted was exactly from yahoo answers, lol.

Answer 19

I had no idea, I feel kind of stupid now...

Answer 20

You're fine, just don't give him credit for plagiarism. >.<

Answer 21

oh ok :)

Answer 22

Good job!