Craig is investigating how long his phone's battery lasts (in hours) for various brightness levels (on a scale of 0-100). His data is displayed in the table and graph below. Do not round between steps. Round answers to at least 4 decimal places. Brightness Level (x) 32 40 48 66 71 77 84 95 Hours (y) 5.6 4.2 5 3.9 3.7 1.8 1.6 1.5 1) Find the equation for the line of best fit. Keep at least 4 decimals for each parameter in the equation. y^ (y hat)= 2) What does the equation predict for the number of hours the phone will last at a brightness level of 71? hours What is the residual for the point (71,3.7)? hours 3) e) Find the 95% prediction interval for the number of hours the phone will last at a brightness level of 71. < y < hours
Craig is investigating how long his phone's battery lasts (in hours) for various brightness levels (on a scale of 0-100). His data is displayed in the table and graph below. Do not round between steps. Round answers to at least 4 decimal places. Brightness Level (x) 32 40 48 66 71 77 84 95 Hours (y) 5.6 4.2 5 3.9 3.7 1.8 1.6 1.5 1) Find the equation for the line of best fit. Keep at least 4 decimals for each parameter in the equation. y^ (y hat)= 2) What does the equation predict for the number of hours the phone will last at a brightness level of 71? hours What is the residual for the point (71,3.7)? hours 3) e) Find the 95% prediction interval for the number of hours the phone will last at a brightness level of 71. < y < hours
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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Craig is investigating how long his phone's battery lasts (in hours) for various brightness levels (on a scale of 0-100). His data is displayed in the table and graph below. Do not round between steps. Round answers to at least 4 decimal places.
| Brightness Level (x) | 32 | 40 | 48 | 66 | 71 | 77 | 84 | 95 |
|---|---|---|---|---|---|---|---|---|
| Hours (y) | 5.6 | 4.2 | 5 | 3.9 | 3.7 | 1.8 | 1.6 | 1.5 |
1) Find the equation for the line of best fit. Keep at least 4 decimals for each parameter in the equation. y^ (y hat)=
2) What does the equation predict for the number of hours the phone will last at a brightness level of 71?
hours
What is the residual for the point (71,3.7)?
hours
3)
e) Find the 95% prediction interval for the number of hours the phone will last at a brightness level of 71.
< y < hours
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