13) Find the value of the linear correlation coefficient r. Managers rate employees according to job...

Question

Question

math Statistics-And-Probability

Answer 1

Answer #1

A)

S.No х (x-7) (4-7) 1 2 3 4 5 6 7 8 9 10 Total 72 67 78 82 75 87 92 83 87 78 801 y 59 63 65 69 58 77 76 69 70 64 670 65.6100 1

correlation r='Sxy/(√Sxx*Syy) =

0.863

B)

sample size n=	10
x̅ =	80.1000
y̅ =	67.0000
S_xx=	Σ(X_i-X̅)²=	520.900
S_xy =	Σ(X_i-X̅)(Y_i-Y̅)=	380.000
slope= β̂₁ =	S_xy/S_xx=	0.7295
intercept= β̂₀ =	y̅-β₁x̅=	8.5665
*Least square line equation: ŷ = 8.5665+0.7295x**

Answer 2

Similar Homework Help Questions

10) Managers rate employees according to job performance and attitude. The results for several randomly selected...

10) Managers rate employees according to job performance and attitude. The results for several randomly selected employees are given below. Performance 59 | 63 | 65 | 69 | 58 | 77 | 76 | 69 7064 Attitude 72 67 78 82 75 8792 83 87 78
7. The following table list s manager ratings of job performance and attitude for several employees:...

7. The following table list s manager ratings of job performance and attitude for several employees: Performance (x)--59-63-65-69-m-76_.69-SA Attitude (y) 72 67 78 82 87 92 83 78 a) Plot the scatter diagram for the paired data b) Assuming a 5% level of significance, use hypothesis testing and the linear correlation coefficient (r) to determine if there is a linear correlation. c) Find the equation of the regression line and plot it on your scatter diagram using an x of...
Managers rate employees according to Job Performance and Attitude. The results for several randomly selected employees...

Managers rate employees according to Job Performance and Attitude. The results for several randomly selected employees are given below: Performance X | 60 | 63 65 Attitude Y 72 67 78 71 | 57 | 79 | 80 | 69 | 70 | 63 82 75 87 92 82 88 78 Test the claim that the population correlation coefficient p > 0. Use a=.01. Be sure to include the statements of the null and alternative hypotheses, the Test used, the...

Consider the below matrixA, which you can copy and paste directly into Matlab.

Problem #1: Consider the below matrix A, which you can copy and paste directly into Matlab. The matrix contains 3 columns. The first column consists of Test #1 marks, the second column is Test # 2 marks, and the third column is final exam marks for a large linear algebra course. Each row represents a particular student.A = [36 45 75 81 59 73 77 73 73 65 72 78 65 55 83 73 57 78 84 31 60 83...
Use the accompanying data set on the pulse rates (in beats per minute) of males to...

Use the accompanying data set on the pulse rates (in beats per minute) of males to complete parts (a) and (b) below. LOADING... Click the icon to view the pulse rates of males. a. Find the mean and standard deviation, and verify that the pulse rates have a distribution that is roughly normal. The mean of the pulse rates is 71.871.8 beats per minute. (Round to one decimal place as needed.) The standard deviation of the pulse rates is 12.212.2...
1. Forecast demand for Year 4. a. Explain what technique you utilized to forecast your demand....

1. Forecast demand for Year 4. a. Explain what technique you utilized to forecast your demand. b. Explain why you chose this technique over others. Year 3 Year 1 Year 2 Actual Actual Actual Forecast Forecast Forecast Demand Demand Demand Week 1 52 57 63 55 66 77 Week 2 49 58 68 69 75 65 Week 3 47 50 58 65 80 74 Week 4 60 53 58 55 78 67 57 Week 5 49 57 64 76 77...

Managers in a certain large company rate employees based on attitude and productivity. A random sample...

Managers in a certain large company rate employees based on attitude and productivity. A random sample of employees had the following ratings. 75 Attitude (x) Productivity (y) 77 62 67 69 81 96 75 67 87 98 92 100 83 89 87 91 80 a) Find the least squares regression line b) Interpret the slope in context c) Describe the relationship between attitude and productivity (be sure to mention the 3 aspects) d) Find the value of the coefficient of...
The given data is the grades for people in this class. The goal here is to...

The given data is the grades for people in this class. The goal here is to determine the factors that effect student's Grade in the class. 4) Find the mean and median for the men's and the women's Quizzes. Gender Men Women 5) Test the claim that the majority of students at this class are women. F M F F M F F F F M M F F F M F F F F M M F F M...
Find the indicated measure. The test scores of 40 students are listed below. Find P85.

Find the indicated measure. The test scores of 40 students are listed below. Find P85. 30 35 43 44 47 48 54 55 56 57 59 62 63 65 66 68 69 69 71 72 72 73 74 76 77 77 78 79 80 81 81 82 83 85 89 92 93 94 97 98 1) 85 2) 87 3) 89 4) 34

Find the indicated measure. The test scores of 40 students are listed below. Find P85. 30...

Find the indicated measure. The test scores of 40 students are listed below. Find P85. 30 35 43 44 47 48 54 55 56 57 59 62 63 65 66 68 69 69 71 72 72 73 74 76 77 77 78 79 80 81 81 82 83 85 89 92 93 94 97 98 1) 85 2) 87 3) 89 4) 34