What is the means-to-MAD ratio of the two data sets, expressed as a decimal to the nearest tenth?
Data Set 1: {14, 18, 21, 15, 17}
Data Set 2: {15, 17, 22, 20, 16}

- anonymous

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- anonymous

I think its 1.5

- anonymous

@iGreen

- YoungStudier

Ok, so what is the mean for each data set?

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## More answers

- anonymous

@Luigi0210

- YoungStudier

I am literally doing this stuff right now in my math course.

- anonymous

umm xD

- anonymous

1 sec

- anonymous

for set 1: 17 and Set 2: 18

- YoungStudier

Ok, gimme one second, I have to look up the formula in my book and I'll double check the things as we go through them.

- anonymous

ok xD

- anonymous

Wait the answer would be 1.1?

- anonymous

Because you divide 18 by 17

- YoungStudier

urm, one moment, I'm helping two other people as well so I gotta check the means quick

- anonymous

ok

- anonymous

I know its that because i retook them Because i didnt pass it the first time Btw not a test But i did get to retake it

- YoungStudier

Ok, so the means are right, now we have to find the MAD

- anonymous

But the questions did change

- anonymous

xD

- anonymous

how do you get mad?

- anonymous

For first one it is 2
and 2nd one it is 2.4

- YoungStudier

I'll double check it, one moment

- anonymous

MAD - Mean absolute deviation of a component of a data set is the total difference between that component and a given point. In general, the central tendency is the measure of a point from which the deviation is measured, more frequently the median or sometimes the mean of the data set. The Mean Absolute Deviation also called as average deviation of a data set {x1, x2, ..., xn} is the average of the absolute deviations and is a abstract statistic of statistical distribution or set of data. The mean absolute deviation often abbreviated as MAD and calculated from the formula

- anonymous

Total Inputs(N) =(15, 17, 22, 20, 16)
Total Inputs(N)=5
Mean(xm)= (x1+x2+x3...xN)/N
Mean(xm)= 90/5
Means(xm)= 18
-------------------------------------------
MAD=
1/(N)*(|x1-xm|+|x2-xm|+..+|xN-xm|)
=1/5(|15-18|+|17-18|+|22-18|+|20-18|+|16-18|)
=1/5(3+1+4+2+2))
=2.4

- YoungStudier

Ok, so your MAD are correct

- anonymous

:)

- YoungStudier

now we subtract the first data set mean from the second data set mean

- YoungStudier

so 17-18=?

- YoungStudier

@MasterTeemo

- anonymous

Ok back @YoungStudier

- anonymous

-1

- YoungStudier

ok, so now we divide that by the larger MAD

- anonymous

6.4?

- anonymous

so 6.4/-1?

- YoungStudier

mm, no. Hold on.

- anonymous

wait it was 2.4 xD

- YoungStudier

So it would be -1/2.4=?

- anonymous

yeh

- anonymous

-0.41666666666

- anonymous

xD

- anonymous

0.4? is the answer?

- YoungStudier

Do you have any answer choices for this one?

- anonymous

nope

- anonymous

its a type in

- YoungStudier

does it say to round to the nearest number or somethin?

- YoungStudier

@MasterTeemo ?

- anonymous

Yep

- anonymous

expressed as a decimal to the nearest tenth?

- YoungStudier

One moment

- anonymous

would it have been 18-17 then 1/2.4?

- anonymous

then the answer be 0.4?

- anonymous

or no?

- anonymous

http://ncalculators.com/statistics/mean-absolute-deviation-calculator.htm is what i used to get the MAD

- YoungStudier

Nope, -0.42
www.calculatorsoup.com/calculators/math/roundingnumbers.php type the number into the calculator

- anonymous

But i has to be -0.4 xD

- anonymous

it*

- YoungStudier

did you type it in?

- anonymous

yep

- YoungStudier

so it is -0.42

- anonymous

-0.4

- anonymous

Because the bar thing has a dropdown choice you you have to pick tenths

- YoungStudier

Oh, sorry, I didn't realize. Yes, -0.4 is correct

- anonymous

:)

- anonymous

XD only on question 2 Now time for question 3 :)

- YoungStudier

LOL, I forgot about the option. m'kay, do you need help with that one also?

- anonymous

yeh

- anonymous

3/5 XD

- anonymous

Alexander found the means-to-MAD ratio of two data sets to be 0.8.
What can he conclude about the distributions?
A.
They are similar.
B.
They are somewhat similar.
C.
They are different.
D.
They are identical.

- anonymous

ill open new questions and tag you and give you 5 medals k?

- YoungStudier

ok...

- anonymous

xD dont worry i wont lie like most people do

- YoungStudier

Oh no, I've never had that happen to me. I don't actually really care that much about the medals LOL

- anonymous

LOL

- anonymous

So The answer would be B for this next q?

- YoungStudier

Ok, so what do you think the answer is to the second one you posted here?

- anonymous

B?

- YoungStudier

mmm, no.

- anonymous

xD

- anonymous

oh wait its 0.8 so no

- anonymous

would it be Identical?

- YoungStudier

Remember: If the ratio is less than or equal to one, the two distributions are similar.
What do you think the answer is now?

- anonymous

D?

- YoungStudier

I don't remember reading anything about ratios being identical in the lesson, do you?

- anonymous

nope xD because i really didnt read it

- anonymous

i kinda read part but not all

- anonymous

so C? xD

- YoungStudier

Reread what I said a little bit above. It's not C

- anonymous

oh ok So A?

- anonymous

xD sorry wasnt paying attenchen

- YoungStudier

Yep! A is correct. XD
I'm no iGreen, but hey, I actually read through this lesson (I haven't done the bookwork or test yet. LOL)

- anonymous

Some of my friends just said it was D xD

- anonymous

majesty777:
Nope D, they are identical because it says TWO sets of data of 0.8

- YoungStudier

Hm..... Okay....Now you made me confused. O_O

- anonymous

xD

- anonymous

majesty777:
Well it says two sets of the SAME 0.8 that is identical

- anonymous

Who DO I Beleve?

- anonymous

@surjithayer

- anonymous

ok ill go with a

- anonymous

Data Set 1 has a mean of 54 and a MAD of 4. Data Set 2 has a mean of 60 and a MAD of 2.
What can you conclude about the two distributions?
Choose exactly two answers that are correct.
A.
The means-to-MAD ratio is 3.
B.
The means-to-MAD ratio is 1.5.
C.
The distributions are similar.
D.
The distributions are somewhat similar.

- anonymous

B and C?

- YoungStudier

B is correct, but not C

- anonymous

So B AND D?

- YoungStudier

And the question with -0.4, I was wrong, that is actually 0.4 (positive) because of the absolute value lines around the mean-mean/MAD larger

- anonymous

oh ok

- anonymous

Hailey records the weights of five dogs of one breed and five dogs of another breed.
What can she infer about the weights of Breed 1 dogs and Breed 2 dogs?
Breed 1: {45, 38, 49, 52, 51}
Breed 2: {36, 35, 44, 50, 40}
A.
Breed 1 dogs and Breed 2 dogs have similar weight distributions.
B.
Breed 1 dogs and Breed 2 dogs have somewhat similar weight distributions.
C.
Breed 1 dogs and Breed 2 dogs have no overlap in their weight distributions.
D.
Breed 1 dogs and Breed 2 dogs have identical weight distributions.

- YoungStudier

Yes, It's B and D for the one

- YoungStudier

Not this one, the one before, ugh sorry, I thought it posted, guess not...

- anonymous

Yeh

- anonymous

I know

- anonymous

MAD of Breed 1: 4.4 Mean: 47
MAD of Breed 2: 4.8 Mean: 41

- anonymous

47-41/4.8 = 1.25

- YoungStudier

So: If the ratio is between 1 and 2.5, then the distributions are somewhat similar.

- anonymous

D Or B?

- anonymous

Ok Ima See What I got XD

- anonymous

Are you sure the answers you told be are correct?

- anonymous

Because i need this done xD

- YoungStudier

IT would be B.
I believe so, if you don't believe me try googling them, a couple open study, brainly, or yahoo answers might show up.

- anonymous

:D 100%!

- anonymous

Best PERSON ON OS!

- anonymous

You AND Igreen ARe the BEst!

- anonymous

Well Gtg xD

- YoungStudier

LOL, thanks. ^_^
I just helped you through it, you did the hard part. :D Good job!

- YoungStudier

See ya!

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