AP+Statistics+Chap+4+Section+1

AP+Statistics+Chap+4+Section+1 - AP Statistics Chapter 4...

Info iconThis preview shows pages 1–9. Sign up to view the full content.

View Full Document Right Arrow Icon
AP Statistics Chapter 4 Section 1
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
3 types of models Linear: Exponential: Power: b mx y + = x ab y = b ax y =
Background image of page 2
If…then If the growth is best modeled by an exponential equation, then the log of the response variable graphed against the explanatory variable will be linear. If the growth is best modeled by a power equation, then the log of the response variable graphed against the log of the explanatory variable will be linear.
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Process 1. Draw scatterplot and describe 2. Assess growth – Is it linear, exponential, or power (use r) 3. Draw appropriate scatterplot for type of growth. (linear – same, exponential – log y versus x, power – log of y versus log of x) 4. Find linear model for adjusted scatterplot 5. Look at residuals to assess strength of model 6. Use linear model for prediction 7. Convert back to original data 8. Find model for original data
Background image of page 4
85 90 91 92 93 94 95 96 12000 10000 8000 6000 4000 2000 YEAR # of transactions in millions versus the year This scatterplot shows a slightly curved pattern in a positive direction.
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Compare the correlation coefficients: R = .9695 R = .9983 Exponential shows the strongest relationship R = .9973
Background image of page 6
4.0 3.9 3.8 3.7 3.6 3.5 Logs of # of transactions 1 90 91 92 93 94 95 96 Year
Background image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
90 91 92 93 94 95 96 Year 4 3.75 3.5 Logs of # of Transactions x y 0467 . 4197 . ˆ
Background image of page 8
Image of page 9
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 22

AP+Statistics+Chap+4+Section+1 - AP Statistics Chapter 4...

This preview shows document pages 1 - 9. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online