EXAMPLE 3. Sam is interested in predicting the amount of time it takes him to write a report (minutes) based on its word count. He randomly selects 7 reports and records the amount of time it took him to write each report and the corresponding word count. Given the following table of additional information: |1,606 909 1,222,691 130,988 E„(4 – 2)(y, – 9) 298,909 Identify, in words, the dependent variable. O a. X = a report's word count O b. Y = a report's word count O .Y = amount of time it takes Sam to write a report (minutes) o d. X = amount of time it takes Sam to write a report (minutes) Calculate the standard deviation of X. a. 494.5080 b. 417.9356 c. 390.9429 d. None of the other choices

EXAMPLE 3. Sam is interested in predicting the amount of time it takes him to write a report (minutes) based on its word count. He randomly selects 7 reports and records the amount of time it took him to write each report and the corresponding word count. Given the following table of additional information: |1,606 909 1,222,691 130,988 E„(4 – 2)(y, – 9) 298,909 Identify, in words, the dependent variable. O a. X = a report's word count O b. Y = a report's word count O .Y = amount of time it takes Sam to write a report (minutes) o d. X = amount of time it takes Sam to write a report (minutes) Calculate the standard deviation of X. a. 494.5080 b. 417.9356 c. 390.9429 d. None of the other choices

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Description: Hi, I would appreciate if you could help me with these questions please.Thank you so much in advance. Find the correlation coefficient between X and Y.a. None of the other choicesb. 0.8410c. 0.6402d. 0.7469What is the direction of the linear associat

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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Concept explainers

Statements and Logic

Logic is the analysis of general patterns of thoughts without regard to any specific sense of context.

Topic Video

Question

Hi, I would appreciate if you could help me with these questions please.

Thank you so much in advance.

Find the correlation coefficient between X and Y.
a. None of the other choices
b. 0.8410
c. 0.6402
d. 0.7469
What is the direction of the linear association?
a. None of the other choices
b. Weak
c. Strong
d. Moderate
Calculate the coefficient of determination.
a. 0.5579
b. None of the other choices
c. 0.4099
d. 0.7073
Determine the least squares regression equation.
a. ý = 516.3330+0.2445r
b. ý = -2755.8231 + 2.282.r
c. ý = 1383.7785+0.2445r
d. ý
-468.299 + 2.282.r

EXAMPLE 3.
Sam is interested in predicting the amount of time it takes him to write a report (minutes) based on its word count. He randomly selects 7 reports and records the amount of
time it took him to write each report and the corresponding word count. Given the following table of additional information:
1,606
909
|1,222,691
|130,988
E( - 2)(y: - )298,909
Identify, in words, the dependent variable.
a. X = a report's word count
b. Y = a report's word count
c. Y = amount of time it takes Sam to write a report (minutes)
d. X = amount of time it takes Sam to write a report (minutes)
Calculate the standard deviation of X.
a. 494.5080
b. 417.9356
c. 390.9429
d. None of the other choices

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