math help needed

- bobobox

math help needed

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- katieb

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- bobobox

Here is the question

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- bobobox

First two options

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- bobobox

Last two option

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## More answers

- bobobox

me too if i dont finish theses last assignments right no I cant take my final exam and If I cant take my final exam I am going to stay back

- rvc

lol @UsukiDoll

- bobobox

@jim_thompson5910

- bobobox

anyone?

- bobobox

I am almost in teaars here people i need help

- UnkleRhaukus

the last thing you have does is to plot the data,
what happens next?

- bobobox

im not sure I need someone to go through the step with me thats why im here

- UnkleRhaukus

the question says you have plotted the data, and already have a line of best fit,
the options are
A plot the data... [already complete]
B offer a conclusion
C draw a line of best fit [already complete]
D find correlation coefficient

- UnkleRhaukus

how can you offer a conclusion without first finding a quantitative measure ?

- bobobox

D I think becuase it's the legitmitlly the most logical

- bobobox

becuase you are right you cant just offer a conclusion

- UnkleRhaukus

makes sense

- bobobox

I cant just go with what makes sense I need to make sure I choose the best answer or else I will not be going to be able to go to highschool

- UnkleRhaukus

You have four options,
presumably one is correct, and three are incorrect.
If you have found that option D is more correct than A,B,C,
D must be the correct option.

- bobobox

I know but they pressure here is imense I think it's d but I have never been very good at math.... There is a 25% percent chance I will get it right

- UnkleRhaukus

There is a 25% chance if you don't read the question and simply guess.
We read the question, and ruled out two of the option immediately.
This left us with two options and and 50% chance of guessing right.
Then we used reason, to assert that one of the remaining options made more sense than the other remaining option.
If our reasoning is sound, we have found the correct option with 100% probability.

- bobobox

do you think you might be able to walk me through the last two questions?

- UnkleRhaukus

ok

- bobobox

Question

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- bobobox

First two options

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- bobobox

Last two answer

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- UnkleRhaukus

according to http://mathbits.com/MathBits/TISection/Statistics2/correlation.htm
" A correlation greater than 0.8 is generally described as strong, whereas a correlation
less than 0.5 is generally described as weak. "

- UnkleRhaukus

so what do you think about a correlation coefficient of 0.67

- bobobox

at first I thought maybe it was b but now im not to sure

- UnkleRhaukus

Are there only two options here?

- bobobox

no

- UnkleRhaukus

oh, right i see all four options now

- bobobox

okay good

- UnkleRhaukus

A: Yes, everyone who doesn't exercise is by definition unhealthy
for this to be true , we would expect the correlation coefficient to very close to 1.00

- bobobox

okay so not a

- UnkleRhaukus

B: Yes, the correlation coefficient is above 0.5, so that implies causation
hmmm 0.67 is above 0.50

- UnkleRhaukus

C: No, the data are only weakly correlated and may people are healthy who don't exercise
for this to be true we would expect correlation to be <0.50

- bobobox

this is true

- UsukiDoll

your correlation is 0.67 so that's >0.5 it's not a weak one

- bobobox

esaxcly

- bobobox

my spelling sucks

- UnkleRhaukus

D: No, poor health and not exercising are completely unrelated
for this to be true
we would expect correlation to be close to 0.00

- UsukiDoll

obviously not C and D. doesn't make sense if your correlation is above 0.5

- bobobox

so wouldn't it be b?

- UsukiDoll

yeah

- bobobox

ready for my last question of the day

- UnkleRhaukus

yeap, there is significant correlation

- UnkleRhaukus

NEXT q

- bobobox

Question

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- bobobox

First two options

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- bobobox

Last two options

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- UnkleRhaukus

What do you think of the options?
Some of the statements in the options are too strong, can you rule them out?

- UsukiDoll

so Michele plays better than other teams and watches videos. wow !

- bobobox

i dont think it can be a becuase it true, you can see how the other team play and attacks

- UnkleRhaukus

i agree, option A cannot be right, the statement is too strong

- bobobox

its not d because we have information... right?

- UsukiDoll

I think it's double edge sword
1. she is already good before watching videos of other teams
2. she is a horrible player so she watches videos and copies moves from other teams

- bobobox

this is hard....you are right it's a double edge sword

- UsukiDoll

getting good at soccer requires skill and practice.

- bobobox

yeah

- UnkleRhaukus

Which is the correct option @bobobox ?

- UsukiDoll

I think b is ridiculous. Players can't copy everything perfectly without messing it up.

- bobobox

i think it's c becuase I can watch all the soccor in the world and I wont be playing at the world cup

- bobobox

what do you guys think

- UnkleRhaukus

yeah, watching videos and playing better did correlate, but we cannot draw any conclusion about causation, there are many other factors at play

- bobobox

wait so what about d

- UnkleRhaukus

we concluded that there was a correlation

- UsukiDoll

there are other reasons to why she played better
- extra practice
- after school practice
- private coaching

- bobobox

okay so c

- UnkleRhaukus

yay!

- bobobox

okay that right!!!! But the question we did before this was wrong

- UnkleRhaukus

Are you sure?

- UnkleRhaukus

hmmm i suppose a correlation of 0.67 doesn't really imply a causation, it just suggests one

- UnkleRhaukus

but 0.67 is much greater than 0.50, it's not a weak correlation,
unless the thresholds i got form that web-sight are way off

- bobobox

Positive but that's okay I got a 70 exactly so I'm happy

- UnkleRhaukus

what was the answer they wanted?

- UnkleRhaukus

the other options all seem worse

- UsukiDoll

WHAT! Ok I'm glad that the last question was right but yeah I agree with Unkle. what do they want?

- UsukiDoll

and it's website xD

- UnkleRhaukus

my spelling sucks tooo

- bobobox

It's Laurel springs school and they don't tell you the right answer they just say it's wrong

- UsukiDoll

either the site Unkle got was wrong or they are stupid

- UsukiDoll

that's a private school? O_O!

- rvc

Good job @UnkleRhaukus and @UsukiDoll

- UnkleRhaukus

assuming Laurel springs school is right:
i guess it has to be
C: "No, the data are only weakly correlated and may people are healthy who don't exercise"
and that the threshold they are using is <0.70 , is weak correlation.

- bobobox

Agreed I could have never done that without you guys

- UsukiDoll

OH WOW! How does Physical Education work in an online school XD

- UsukiDoll

i had to go to a gym at my high school

- UnkleRhaukus

Remember that even a perfect correlation, doesn't imply causation.

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