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MTH 220 May 25 Open Questions
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AvatarGreg Miller
9:14
Ok.. gotta roll.. Kasey is calculating!!  See each of you in the morning!
...she's not listening.. LOL...
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9:12
K
Ashli Owens
9:11
Oh, I forgot about that! Thank you...
AvatarGreg Miller
Kasey.. you good for now.. to look at thread for more help if you keep working?  Thanks, Ashli
9:11
I know.. but 50 isn't a legal value.. extrapolation
Ashli Owens
9:10
For X = 50, I meant using the formula for a 50 degree week, I will look at it tomorrow morning to double check....I am good with that plan, thanks for your help.
AvatarGreg Miller
9:10
Ya'll good with that plan?
So, I'll leave all that here for you to look at and then we can take inventory on where we are in the morning.. sound OK?
9:08
... so all of that will get you both to the point where all that's left is the confidence interval for the slope...
The prediction at x=50 SHOULD NOT BE DONE
The prediction at x = 20 should round to 14.2
9:07
Kasey.. we have left breadcrumbs in here that get you the values of sy, sx, beta1hat and betazero hat...
Ashli Owens
9:06
I wrote the formula wrong...Thanks!
AvatarGreg Miller
9:06
Ok... the intercept estimate will be 24.6557.. that's beta-zero-hat..
Kasey
9:06
ok I finally got it
cool 1
Ashli Owens
9:06
I know it is late, I can check it out with the key tomorrow if you need to go, I can figure it out. Thanks!
AvatarGreg Miller
(-.933)*(9.28132) divide 16.49675 = -.5249
9:02
still too much round off error ashli...
Ashli Owens
9:01
Okay I see a mistake, I have beta hat 1 as -.5655659... now
Kasey
9:00
ok so sorry trying again
cool 1
AvatarGreg Miller
9:00
No .. we didn't.. we said it should be 516.8571429
Kasey
8:59
yes but we said that number should be 576.857
AvatarGreg Miller
Again, r times sy over sx is -.5249... that's beta-one-hat.
8:59
Ashli.. those aren't the right beta1 and beta 0 hats.. but everything else you quoted me was right
8:58
Kasey.. no.. square root of 1632.8571 * 516.8571 is 918.66962 in the denominator of r
Ashli Owens
8:58
Not Beta hat 2, I mean 0
Kasey
8:57
I keep getting -.883 for r
Ashli Owens
8:57
I have slope Beta hat 1 = 0.0566 and Intercept Beta hat 2 = 17.6974
AvatarGreg Miller
8:57
Ashli.... r sy over sx.. will give -.5249
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