Question

Warren is investigating how long his phone's battery lasts (in hours) for various brightness levels (on...

Warren 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.

Brightness Level (x) 35 57 62 70 77 83 88 91
Hours (y) 6.1 3.7 4.8 1.8 2.9 3.2 2.6 1.6

brightness level
10
20
30
40
50
60
70
80
90
100
110

Hours
1
2
3
4
5
6
7
8
9

Brightness Level
Hours

a) Find the equation for the line of best fit. Keep at least 4 decimals for each parameter in the equation.   

b) Interpret the slope in context.

Warren should expect -0.0687 brightness level per hour.
Warren should expect -0.0687 hours per brightness level.
c) What does the equation predict for the number of hours the phone will last at a brightness level of 62?
0 0
Add a comment Improve this question Transcribed image text
Answer #1

_Bright Ness Level (x) - 35 Hours (9) 6.1 3.7 418 I n = Noof obs 209 3.2 2.6 106 sy; = 26.7 3x1= 563 Mean of x;= 70.375- Ÿ =Standard deviation of y: sys syir-n.gz : 1.5137 Covariance between x and y a cor (x,y) Cor(x,y) - Exiy, - noxi correlation &=> y - 3.3375 = -0. 8448*(- 70.373) => y = - 0.0687 x + 8.1749 - This is the line of best fit. b. In this equation slope is =

Add a comment
Know the answer?
Add Answer to:
Warren is investigating how long his phone's battery lasts (in hours) for various brightness levels (on...
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for? Ask your own homework help question. Our experts will answer your question WITHIN MINUTES for Free.
Similar Homework Help Questions
  • Cameron is investigating how long his phone's battery lasts (in hours) for various brightness levels (on...

    Cameron is investigating how long his phone's battery lasts (in hours) for various brightness levels (on a scale of O- 100). His data is displayed in the table and graph below. Brightness Level (x) Hours (y) 16 28 31 43 49 73 86 5 0.1 6.6 5.1 5.2 6 .5 10+ 9 8 7 . 6 . 5 . . Hours w 2 1 40 60 70 84 10 20 30 50 Brightness Level a) Find the equation for the...

  • INN MARGIN ROOMS NEAREST OFFICE COLLEGE INCOME DISTTWN 1 44.2 3471 2.1 523 12 35 9.4...

    INN MARGIN ROOMS NEAREST OFFICE COLLEGE INCOME DISTTWN 1 44.2 3471 2.1 523 12 35 9.4 2 29.8 3567 1.8 140 13.5 42 5.7 3 38.4 3264 1.6 404 22.5 45 4.4 4 54.4 3234 1.1 649 19.5 35 6.5 5 34.5 2730 4 171 17 41 10.5 6 44.9 3003 3.4 402 15.5 37 4.6 7 46 2341 2 580 23 45 7.4 8 50.2 3021 2.6 572 8.5 33 9.3 9 46 2655 3.2 666 22 40 6.7...

  • QUESTION 7 The data set Beer Large, which can be found in StatCrunch Shared Data Sets,...

    QUESTION 7 The data set Beer Large, which can be found in StatCrunch Shared Data Sets, gives the Alcohol, Carbohydrates and Calories for different brands of beer. The explanatory variable is x + Carbohydrates and the response variable is Y - Calories. Use this information to answer: Calculate the correlation between carbohydrates and calories. (4 decimal places) Row vars varo var var 8 var9 var 10 2 الميا ABV 4.1 5.4 4.43 4.13 5.9 4.9 Carbs 2.6 13.7 5.8 5...

  • INN MARGIN ROOMS NEAREST OFFICE COLLEGE INCOME DISTTWN 1 61 3203 0.1 549 8 37 12.1 2 34 2810 1.5 496 17.5 39 0.4...

    INN MARGIN ROOMS NEAREST OFFICE COLLEGE INCOME DISTTWN 1 61 3203 0.1 549 8 37 12.1 2 34 2810 1.5 496 17.5 39 0.4 3 46 2890 1.9 254 20 39 12.2 4 31.9 3422 1 434 15.5 36 2.7 5 57.4 2687 3.4 678 15.5 32 7.9 6 47.5 3080 2.4 488 13.5 31 6.7 7 54.4 2756 1.1 832 14.5 35 6.9 8 46.2 2244 0.7 496 15.5 38 8.9 9 54.1 2862 1.4 809 16.5 33 3...

  • STA2221 examples on CI & Testing of Hypothesis Name MULTIPLE CHOICE. Choose the one alternative that...

    STA2221 examples on CI & Testing of Hypothesis Name MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answer the question Provide an appropriate response. 1) Find the critical value,te for 0.99 and n-10. A) 3.250 B) 3.169 1.833 D) 2.262 2) Find the critical value to forc=0.95 and n=16. A) 2.947 B) 2.602 2120 D) 2.131 3) Find the value of E, the margin of error, for A) 1.69 B) 0.42 0.99, n=16 and s=2.6. C)...

  • 1. Calculate the mean and standard deviation for each variable using formulas or functions. 2. Calculate...

    1. Calculate the mean and standard deviation for each variable using formulas or functions. 2. Calculate descriptive statistics for each variable using the Analysis Toolpak. 3. Calculate the coefficient of variation for each variable. What general interpretation can you make from these values? 4. Calculate the correlation between Revenue and Employees using a formula. Calculate the coefficient of determination. 5. Create a correlation matrix for the eight numerical variables. Note any relationship of interest Rank COMPANY NAME City State Revenue...

  •   1. When it comes to financial matters, the views of Aristotle can be stated as:...

      1. When it comes to financial matters, the views of Aristotle can be stated as: a. usury is nature’s way of helping each other. b. the fact that money is barren makes it the ideal medium of exchange. c. charging interest is immoral because money is not productive. d. when you lend money, it grows more money. e. interest is too high if it can’t be paid back.  2. Since 2008, when the monetary base was about $800 billion,...

  • CASE 1-5 Financial Statement Ratio Computation Refer to Campbell Soup Company's financial Campbell Soup statements in...

    CASE 1-5 Financial Statement Ratio Computation Refer to Campbell Soup Company's financial Campbell Soup statements in Appendix A. Required: Compute the following ratios for Year 11. Liquidity ratios: Asset utilization ratios:* a. Current ratio n. Cash turnover b. Acid-test ratio 0. Accounts receivable turnover c. Days to sell inventory p. Inventory turnover d. Collection period 4. Working capital turnover Capital structure and solvency ratios: 1. Fixed assets turnover e. Total debt to total equity s. Total assets turnover f. Long-term...

ADVERTISEMENT
Free Homework Help App
Download From Google Play
Scan Your Homework
to Get Instant Free Answers
Need Online Homework Help?
Ask a Question
Get Answers For Free
Most questions answered within 3 hours.
ADVERTISEMENT
ADVERTISEMENT