9. The pH levels and mercury levels of several lakes throughout Ohio are measured.Researchers do a regression analysis based on these measurements in order topredict mercury levels from pH levels. The observed measurements were pH levelsbetween 3.0 and 12.0.Due to extrapolation, it would not be reasonable to predict the mercury level for alake with pH levelА. 1.0.В. 3.0.С. 7.0.D. 13.0.E. Both A and D.

Regression analysis is a useful inferential method for forecasting.

Answered: The pH levels and mercury levels of…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Range of ankle motion is a contributing factor to falls among the elderly. Suppose a team of researchers is studying how compression hosiery, typical shoes, and medical shoes affect range of ankle motion. In particular, note the variables Barefoot and Footwear2. Barefoot represents a subject's range of ankle motion (in degrees) while barefoot, and Footwear2 represents their range of ankle motion (in degrees) while wearing medical shoes. Use this data and your preferred software to calculate the equation of the least-squares linear regression line to predict a subject's range of ankle motion while wearing medical shoes, ?̂ , based on their range of ankle motion while barefoot, ? . Round your coefficients to two decimal places of precision. ?̂ = A physical therapist determines that her patient Jan has a range of ankle motion of 7.26°7.26° while barefoot. Predict Jan's range of ankle motion while wearing medical shoes, ?̂ . Round your answer to two decimal places. ?̂ = Suppose Jan's…
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