1. The table below gives the number of hours a student spent studying for a test and their grade.a.) Draw a scatter plot of the data.Hours SpentStudying322510.543Grade on Exam84779270609075b.) Draw the best fit line through the points(5,92) and (1, 70).Grade on Exam90807060c.) Is the correlation positive, negative, or none?f.) Write the equation of the best fit line.50d.) Find the slope of the best fit line: (5, 92) & (1,70)(round to one decimal)0 2 4 6 810Hours Spent Studyinge.) What does the slope mean?T1-04 PlusTEXASg.) Predict the grade for a student who studied for 2.5 hours. Is this an extrapolation or interpolation?

The data corresponds to the number of hours a student has studied and the grades received. Hours…

Answered: 1. The table below gives the number of…

Advanced Engineering Mathematics

10th Edition

ISBN:9780470458365

Author:Erwin Kreyszig

Publisher:Erwin Kreyszig

Chapter2: Second-order Linear Odes

Section: Chapter Questions

Problem 1RQ

See similar textbooks

Similar questions

3. Calculate the coefficient of correlation from the following data by the method of rank differences : 81 78 73 73 69 68 62 58 10 12 y 18 18 18 22 20 24
7. Calculate the rank correlation. 66 65 67 68 69 70 71 72 67 68 69 72 78 80 82 85 y: CS Scanned with CamScanner
Which of the following is the best estimate for the correlation r of the data in the scatterplot below! Answer choices: a.) 1.00 b.) 0.80 c.) -0.83
Given the following data, do the tasks stated below. a) Identify the independent variable and the dependent variable. b) Construct a scatter plot. c) Determine the direction of the straight line that the data points seem to follow. d) Determine the strength of the correlation between the two variables.
Use the data from the given table of values to determine the correlation. In the answer space provided, give the r-value rounded to the hundredth. X Y 2 77 5 92 1 70 0 63 4 90 2 75 3 84
2. The number of hours 13 students spent working on a project and the grade they earned Hours spent on 6| 7 1 2 4 4 5 7 8 project, x Project Grade, y 50 65 71 78 74 70 83 85 98 85 84 90 95 type of correlation: Conclusion: 6
8) Hours of sleep per day vs. Age Hours of sleep per day T N 10 20 Age 30 Consider the scatter plot that shows a y = 0.0789x + 9.02 person's age and the r² = 0.606 number of hours they sleep per night. 40 a) Briefly describe the type and strength of the correlation. b) To determine the number of hours that a 75-year-old would sleep, you would use (fill in the blank with interpolation or extrapolation).
2. Graph the following points, and draw in the line of best fit. Comment on the fit of this line, and state if the correlation is positive or negative. 3 Y 1 2 2 3 4 4 8 5 9 6 13 W 7 17
The data below are the number of absences and the final grades of 9 randomly selected students from a statistics class. Calculate the correlation coefficient, r. number of absences x 2 5 8 6 11 4 17 10 7 final grade y 73 94 57 78 84 100 88 82 84
1. A medical student is studying heart rate. The student wants to know if there relationship between age and heart rate. She collects the following data from children selected at random. Heart rate Age (yrs) 92 89 90 84 79 102 108 12 86 14 a) Make a scatter plot of the data. b) Describe the relationship(positive, negative and none) you see between heart rate and age and determine the type of correlation (linear or non-linear) that exists. Relationship Туре» c) Draw a line of best fit. d) What do you think is the heart rate of a newborn baby? Justify your answer. e) What do you think is the heart rate of someone who is 20 years old? What type of prediction is this?
Jim and Larry run a soup stand. The data below represents the sales of soup that they had on 8 randomly selected days, along with the high temperature on that day. a) Create a scatter diagram for this data set and comment on whether there is a positive or negative relationship between these variables.b) Calculate the correlation coefficient between temperature and sales.c) Does a linear relationship exist between these variables? Explain to me why or why not this is the case.d) Using excel, calculate the least squares regression equation for this data set. e) Using your equation, predict the soup sales on a day where the temperature is 29 degrees.f) Interpret the slope of this equation.g) Can we use this data set and regression equation to predict the sales on a day when the average temperature is 102 degrees? Why or why not?h) What is the R-squared for this equation? How do you interpret that R-squared?
do the following a.) construct a scatter plot. b.) determine the direction of the straight line that the data points seem to follow. c.) determine the strength of correlation between the two variables depicted in each scatter plot. 1. x 1 2 3 4 5 6 7 8 y 30 50 55 70 35 40 75 45

SEE MORE QUESTIONS

Recommended textbooks for you

Advanced Engineering Mathematics

Advanced Math

ISBN:

9780470458365

Author:

Erwin Kreyszig

Publisher:

Wiley, John & Sons, Incorporated

Numerical Methods for Engineers

Advanced Math

ISBN:

9780073397924

Author:

Steven C. Chapra Dr., Raymond P. Canale

Publisher:

McGraw-Hill Education

Introductory Mathematics for Engineering Applicat…

Advanced Math

ISBN:

9781118141809

Author:

Nathan Klingbeil

Publisher:

WILEY

Advanced Engineering Mathematics

Advanced Math

ISBN:

9780470458365

Author:

Erwin Kreyszig

Publisher:

Wiley, John & Sons, Incorporated

Numerical Methods for Engineers

Advanced Math

ISBN:

9780073397924

Author:

Steven C. Chapra Dr., Raymond P. Canale

Publisher:

McGraw-Hill Education

Introductory Mathematics for Engineering Applicat…

Advanced Math

ISBN:

9781118141809

Author:

Nathan Klingbeil

Publisher:

WILEY

Mathematics For Machine Technology

Advanced Math

ISBN:

9781337798310

Author:

Peterson, John.

Publisher:

Cengage Learning,

Basic Technical Mathematics

Advanced Math

ISBN:

9780134437705

Author:

Washington

Publisher:

PEARSON

Topology

Advanced Math

ISBN:

9780134689517

Author:

Munkres, James R.

Publisher:

Pearson,

SEE MORE TEXTBOOKS