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 one year ago
Height (ft) Interval after (min)
96 68
111 80
76 66
91 72
66 58
108 79
116 84
91 79
The data show the time intervals after an eruption (to the next eruption) of a certain geyser. Find the regression equation, letting the first variable be the independent (x) variable. Find the best predicted tie of the interval after an eruption given that the current eruption has a height of 84 feet. Use a significant level of 0.05.
A. What is the regression equation? Ŷ = __ + ___x
B. What is the best predicted value? Ŷ ͌ __ minutes
 one year ago
Height (ft) Interval after (min) 96 68 111 80 76 66 91 72 66 58 108 79 116 84 91 79 The data show the time intervals after an eruption (to the next eruption) of a certain geyser. Find the regression equation, letting the first variable be the independent (x) variable. Find the best predicted tie of the interval after an eruption given that the current eruption has a height of 84 feet. Use a significant level of 0.05. A. What is the regression equation? Ŷ = __ + ___x B. What is the best predicted value? Ŷ ͌ __ minutes

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mathmale
 one year ago
Best ResponseYou've already chosen the best response.1Have you found a regression equation before? Do you happen to have a TI84 calculator available to you?

mathmale
 one year ago
Best ResponseYou've already chosen the best response.1Have you used it before to calculate a regresstion line in the form y=ax+b?

StClowers
 one year ago
Best ResponseYou've already chosen the best response.0i am a rookie at it so i have not

mathmale
 one year ago
Best ResponseYou've already chosen the best response.1Have you previously used the STAT key, which brings up a menu, one of the items on which says EDIT?

mathmale
 one year ago
Best ResponseYou've already chosen the best response.1If you'd press STAT and then EDIT, your calc will display a couple of columns. would you try that, please? are there numbers in the columns, or are they empty?

StClowers
 one year ago
Best ResponseYou've already chosen the best response.0there are numbers under L2

mathmale
 one year ago
Best ResponseYou've already chosen the best response.1If you know how to clear out the numbers in column L2, please do it. Otherwise we may be able to find the regression line without clearing L2.

mathmale
 one year ago
Best ResponseYou've already chosen the best response.1Here's your data: 96 68 111 80 76 66 91 72 66 58 108 79 116 84 91 79 copy everything from the 1st col. into L1; copy everything from the 2nd col. into L2. Any questions about this, please ask.

mathmale
 one year ago
Best ResponseYou've already chosen the best response.1Now press STAT again. You should see a menu; the middle item at the very top should say MATH or CALC. Does it?

mathmale
 one year ago
Best ResponseYou've already chosen the best response.1Please move the cursor to cover MATH OR CALC.

mathmale
 one year ago
Best ResponseYou've already chosen the best response.1tHEN press the character " 4 ". Your calculator will exevcute option #4, whivch is "linear regressin Line" or something like that.

mathmale
 one year ago
Best ResponseYou've already chosen the best response.1Does it display a value for a and a value for b?

mathmale
 one year ago
Best ResponseYou've already chosen the best response.1cool. You're right up there with the best.

mathmale
 one year ago
Best ResponseYou've already chosen the best response.1what is a? what is b?

StClowers
 one year ago
Best ResponseYou've already chosen the best response.0well i hit enter and it went to LinReg(ax+b) and thats it

mathmale
 one year ago
Best ResponseYou've already chosen the best response.1have you pressed ENTER yet?

mathmale
 one year ago
Best ResponseYou've already chosen the best response.1Has the calc. responded with ifnormation / information?

StClowers
 one year ago
Best ResponseYou've already chosen the best response.0oh yes it has...i had to hit enter again...it says: y=as+b a= .4601084431 b= 29.82726569

mathmale
 one year ago
Best ResponseYou've already chosen the best response.1What we're hoping for is a screen that gives you... cool. Now write this equation: y=0.461x + 29.827. That is your regression equation.

StClowers
 one year ago
Best ResponseYou've already chosen the best response.0yay! That was it, now its asking me the next question

mathmale
 one year ago
Best ResponseYou've already chosen the best response.1This problem asks for the regression equation in slightly different format. It asks that you present b first, and then a. So, to asnwer this quaetion, type in 29.827 for the first blank and 0.461 in the 2nd blank. How

mathmale
 one year ago
Best ResponseYou've already chosen the best response.1Now write down on paper that same regression equation.

mathmale
 one year ago
Best ResponseYou've already chosen the best response.1type here what the 2nd question asks you for.

StClowers
 one year ago
Best ResponseYou've already chosen the best response.0ok. What is the best predicted value? Ŷ ͌ __ minutes

mathmale
 one year ago
Best ResponseYou've already chosen the best response.1Thisis very important: You're going to use the regression equation to PREDICT what the value of y (actually, of "y hat") is when x = 84, was it? Go back to the original question and ascertain the x value.

mathmale
 one year ago
Best ResponseYou've already chosen the best response.1On paper, write the regression equation, subbing 84 for x. Calculate y hat.

mathmale
 one year ago
Best ResponseYou've already chosen the best response.1You're done! My regret is that we don't have time to review this whole problem so that every quantity and concept is clear to you. Hope you'll review our conversation and take notes on it so that you'll be able to do problems like this on your own.

StClowers
 one year ago
Best ResponseYou've already chosen the best response.0wow! Thank you so much. I have the others posted but we can do those tomorrow. I REALLY appreciate your help!!

mathmale
 one year ago
Best ResponseYou've already chosen the best response.1As much as I'd like to continue, it's past my bedtime! Don't know when I'll be available tomorrow, but I do expect to be on then and now. I'm so glad you've gotten this one problem behind you and are feeling better. You're most welcome!

StClowers
 one year ago
Best ResponseYou've already chosen the best response.0but one more thing: It ask me to round one decimal place so that would be 69, correct?

mathmale
 one year ago
Best ResponseYou've already chosen the best response.1No, that'd be 68.6. That's to 1 decimal place accuracy.

StClowers
 one year ago
Best ResponseYou've already chosen the best response.0oh gotcha, ok thanks you again! Gnight!! This really helps. I feel better

mathmale
 one year ago
Best ResponseYou've already chosen the best response.1Again, I'm so glad! Good night. Bye for now! Over and out.
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