Use the given data set to complete parts (a) through (c) below. (Use a-0.05.)109.14Click here to view a table of critical values for the correlation coefficient.Xy1048-64-2488.13a. Construct a scatterplot. Choose the correct graph below.OA.AY*****138.75B.Ay1040644-24098.760**************12 10119.278 9148.09C.104B64-2D66.1248 12 1643.09129.14OD.104064:2*****77.26Q54.7419:b. Find the linear correlation coefficient, r, then determine whether there is sufficient evidence to support the claim of a linear correlation between the two variables.The linear correlation coefficient is r=(Round to three decimal places as needed.).

Given that,Sample size Assume the level of significance The data is given on x and y.

Answered: a. Construct a scatterplot. Choose the…

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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Match each scatterplot shown below with one of the four specified correlations. O O ∞oo O oooº 0000 8 9088 08 8 a. -0.89 b. -0.12 c. 0.55 d. 0.98
8. Use the table to find the following, years of experience (x) and salary in 1000$ (y). a. Find linear correlation coefficient. b. Find the line of best fit. c. What would your salary be with 8 years of experience? d. How many years of experience do you need to make 75k?
Suppose the correlation between variables x and y isr = – 1. Also suppose that the data contains the points (6, 14) and (2, 18). Finally, suppose that the x-values in the data set are: æ 2 3 5 6 8 Make a scatterplot of this data set. 20+ 19 18 17 16 15 14 13 12 10 8 6 6
Which of the following best describes the relationship between the variables on the scatter plot below? 11 10 15 4 3. 2 1 1234 56 7 8 9 10 11 12 13 O A. linear association OB. no association OC. non-linear association OD. linear and non-linear association
Compute the linear correlation coefficient. The linear correlation coefficient for the four pieces of data is
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 Spent Studying 3 2 2 5 1 0.5 4 3 Grade on Exam 84 77 92 70 60 90 75 b.) Draw the best fit line through the points (5,92) and (1, 70). Grade on Exam 90 80 70 60 c.) Is the correlation positive, negative, or none? f.) Write the equation of the best fit line. 50 d.) Find the slope of the best fit line: (5, 92) & (1,70) (round to one decimal) 0 2 4 6 8 10 Hours Spent Studying e.) What does the slope mean? T1-04 Plus TEXAS g.) Predict the grade for a student who studied for 2.5 hours. Is this an extrapolation or interpolation?
4. Consider the following data: XINMASSN 1 2 3 4 5 6 7 y 6 7 5 4 3 1 2 a) Make a scatterplot of these data. The variable labeled "x" should be plotted along the x-axis. Describe the pattern. b) Find the correlation coefficient for these data.
Page 34 Compute the correlation coe cient, r, for the following table: X 10 y 5 12 15 16 1 4 6 18 1 9 7 8 1 25 12 14 17 3 6
EXAMPLE Student Scores in Statistics (X) Scores in Physics (Y) The data at the right shows the scores Stephanie Beverly Angel Regine Kim 11 11 of five students in Statistics and 7 8 Physics quizzes. Calculate the 10 12 correlation coefficient. 12 10 4 5 Solution: Steps 1. Construct a table shown on the right side. Solution Student X Y X2 y2 XY Stephanie Beverly Angel Regine Kim 11 11 7 8 10 12 12 10 4 5 2. Complete the table. Square the entries in column X and column Y, and put them under column X² and column Y², respectively. Multiply entries in the X and Y columns and put them under XY column. Student X Y x2 XY Stephanie Beverly Angel Regine Kim 11 11 121 121 121 7 8 49 64 56 10 12 100 144 120 12 10 144 100 120 5 16 25 20 3. Get the sum off all entries in each column. x2 y2 Student Y XY Stephanie 7 11 11 121 121 121 Beverly Angel Regine Kim 8. 49 64 56 10 12 100 144 120 12 10 144 100 120 4 5 16 25 20 Total 44 46 430 454 437 Y XY η ΣΧΥ-ΣΧ ΣΥ V[n EX2 – (E x)²][n£Y² – (E Y)²] 5(437) –…
9. Tell whether the correlation coefficient would be closest to -1, 0 or 1. a. b. с. 150 150 150 100 100 100 50 50 50 0 2 4 6 x 0 2 4 6x 0 2 4 6 x
Bt.20.
urgen please

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