bobobox
  • bobobox
math help needed
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
bobobox
  • bobobox
Here is the question
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bobobox
  • bobobox
First two options
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bobobox
  • bobobox
Last two option
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bobobox
  • 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
  • rvc
lol @UsukiDoll
bobobox
  • bobobox
@jim_thompson5910
bobobox
  • bobobox
anyone?
bobobox
  • bobobox
I am almost in teaars here people i need help
UnkleRhaukus
  • UnkleRhaukus
the last thing you have does is to plot the data, what happens next?
bobobox
  • bobobox
im not sure I need someone to go through the step with me thats why im here
UnkleRhaukus
  • 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
  • UnkleRhaukus
how can you offer a conclusion without first finding a quantitative measure ?
bobobox
  • bobobox
D I think becuase it's the legitmitlly the most logical
bobobox
  • bobobox
becuase you are right you cant just offer a conclusion
UnkleRhaukus
  • UnkleRhaukus
makes sense
bobobox
  • 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
  • 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
  • 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
  • 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
  • bobobox
do you think you might be able to walk me through the last two questions?
UnkleRhaukus
  • UnkleRhaukus
ok
bobobox
  • bobobox
Question
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bobobox
  • bobobox
First two options
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bobobox
  • bobobox
Last two answer
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UnkleRhaukus
  • 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
  • UnkleRhaukus
so what do you think about a correlation coefficient of 0.67
bobobox
  • bobobox
at first I thought maybe it was b but now im not to sure
UnkleRhaukus
  • UnkleRhaukus
Are there only two options here?
bobobox
  • bobobox
no
UnkleRhaukus
  • UnkleRhaukus
oh, right i see all four options now
bobobox
  • bobobox
okay good
UnkleRhaukus
  • 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
  • bobobox
okay so not a
UnkleRhaukus
  • UnkleRhaukus
B: Yes, the correlation coefficient is above 0.5, so that implies causation hmmm 0.67 is above 0.50
UnkleRhaukus
  • 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
  • bobobox
this is true
UsukiDoll
  • UsukiDoll
your correlation is 0.67 so that's >0.5 it's not a weak one
bobobox
  • bobobox
esaxcly
bobobox
  • bobobox
my spelling sucks
UnkleRhaukus
  • 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
  • UsukiDoll
obviously not C and D. doesn't make sense if your correlation is above 0.5
bobobox
  • bobobox
so wouldn't it be b?
UsukiDoll
  • UsukiDoll
yeah
bobobox
  • bobobox
ready for my last question of the day
UnkleRhaukus
  • UnkleRhaukus
yeap, there is significant correlation
UnkleRhaukus
  • UnkleRhaukus
NEXT q
bobobox
  • bobobox
Question
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bobobox
  • bobobox
First two options
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bobobox
  • bobobox
Last two options
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UnkleRhaukus
  • UnkleRhaukus
What do you think of the options? Some of the statements in the options are too strong, can you rule them out?
UsukiDoll
  • UsukiDoll
so Michele plays better than other teams and watches videos. wow !
bobobox
  • bobobox
i dont think it can be a becuase it true, you can see how the other team play and attacks
UnkleRhaukus
  • UnkleRhaukus
i agree, option A cannot be right, the statement is too strong
bobobox
  • bobobox
its not d because we have information... right?
UsukiDoll
  • 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
  • bobobox
this is hard....you are right it's a double edge sword
UsukiDoll
  • UsukiDoll
getting good at soccer requires skill and practice.
bobobox
  • bobobox
yeah
UnkleRhaukus
  • UnkleRhaukus
Which is the correct option @bobobox ?
UsukiDoll
  • UsukiDoll
I think b is ridiculous. Players can't copy everything perfectly without messing it up.
bobobox
  • 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
  • bobobox
what do you guys think
UnkleRhaukus
  • 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
  • bobobox
wait so what about d
UnkleRhaukus
  • UnkleRhaukus
we concluded that there was a correlation
UsukiDoll
  • UsukiDoll
there are other reasons to why she played better - extra practice - after school practice - private coaching
bobobox
  • bobobox
okay so c
UnkleRhaukus
  • UnkleRhaukus
yay!
bobobox
  • bobobox
okay that right!!!! But the question we did before this was wrong
UnkleRhaukus
  • UnkleRhaukus
Are you sure?
UnkleRhaukus
  • UnkleRhaukus
hmmm i suppose a correlation of 0.67 doesn't really imply a causation, it just suggests one
UnkleRhaukus
  • 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
  • bobobox
Positive but that's okay I got a 70 exactly so I'm happy
UnkleRhaukus
  • UnkleRhaukus
what was the answer they wanted?
UnkleRhaukus
  • UnkleRhaukus
the other options all seem worse
UsukiDoll
  • UsukiDoll
WHAT! Ok I'm glad that the last question was right but yeah I agree with Unkle. what do they want?
UsukiDoll
  • UsukiDoll
and it's website xD
UnkleRhaukus
  • UnkleRhaukus
my spelling sucks tooo
bobobox
  • bobobox
It's Laurel springs school and they don't tell you the right answer they just say it's wrong
UsukiDoll
  • UsukiDoll
either the site Unkle got was wrong or they are stupid
UsukiDoll
  • UsukiDoll
that's a private school? O_O!
rvc
  • rvc
Good job @UnkleRhaukus and @UsukiDoll
UnkleRhaukus
  • 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
  • bobobox
Agreed I could have never done that without you guys
UsukiDoll
  • UsukiDoll
OH WOW! How does Physical Education work in an online school XD
UsukiDoll
  • UsukiDoll
i had to go to a gym at my high school
UnkleRhaukus
  • UnkleRhaukus
Remember that even a perfect correlation, doesn't imply causation.

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