True or false: The Pearson's correlation coefficient of +0.4 shows a stronger linear association than a...
True or false: The Pearson's correlation coefficient of +0.4 shows a stronger linear association than a correlation coefficient of -0.4
True or false: If the value of the Pearson's correlation coefficient between two variables is equal to -0.7, it means that 49% of the variability in one variable can be explained by the other.
Homework Answers
Solution :
1)
False
The Pearson's correlation coefficient of +0.4 shows a same linear association than a correlation coefficient of -0.4
2)
True
R square = (-0.7)2 = 0.49
Add Answer to:
True or false: The Pearson's correlation coefficient of +0.4
shows a stronger linear association than a...
Use the value of the linear correlation coefficient to find the coefficient of determination and the...
Use the value of the linear correlation coefficient to find the coefficient of determination and the percentage of the total variation that can be explained by the near relationship between the two variables r=0.316 What is the value of the coefficient of determination? 7- (Round to four decimal places as needed.) What is the percentage of the total variation that can be explained by the linear relationship between the two variables? Explained variation - (Round to two decimal places as...
Use the value of the linear correlation coefficient r to find the coefficient of determination and...
Use the value of the linear correlation coefficient r to find the coefficient of determination and the percentage of the total variation that can be explained by the linear relationship between the two variables. r=0.694 What is the value of the coefficient of determination? r2=______ (Round to four decimal places as needed.) What is the percentage of the total variation that can be explained by the linear relationship between the two variables? Explained variation=______% (Round to two decimal places as...
Determine if the following statement is true or false. A correlation coefficient close to 1 is...
Determine if the following statement is true or false. A correlation coefficient close to 1 is evidence of a cause-and-effect relationship between the two variables. The statement is true O A. False. Only a correlation coefficient close to 0 indicates a cause-and-effect relationship between the two variables O B. False. A correlation coefficient should not be interpreted as a cause-and-effect relationship O c. True, but only if all the conditions for correlation are met. False. A correla.on coefficient of 1...
Use the value of the linear correlation coefficient r to find the coefficient of determination and...
Use the value of the linear correlation coefficient r to find the coefficient of determination and the percentage of the total variation that can be explained by the linear relationship between the two variables. r 0.301 What is the value of the coefficient of determination? -(Round to four decimal places as needed.)
Which of the following is false? Correlation coefficient and the slope always have the same sign...
Which of the following is false? Correlation coefficient and the slope always have the same sign (positive or negative). If the correlation coefficient is 1, then the slope must be 1 as well. Correlation measures the strength of linear association between two numerical variables. If the correlation between two variables is close to 0.01, then there is a very weak linear relation between them.
True or False 1. The correlation coefficient is way to determine if one variable causes another...
True or False 1. The correlation coefficient is way to determine if one variable causes another variable to change. 2. A linear model is representation of the linear relationship between two variables. 3. The least squares line, or line of best fit, is the line which minimizes the sum of the individual squares of the residuals. 4. Most linear models do not have any residuals. 5. Regression equations can be used to make predictions. However, the context of the data...
True or False: if the r(correlation coefficient) is closer to 1, the slope(beta) will be larger...
True or False: if the r(correlation coefficient) is closer to 1, the slope(beta) will be larger to reflect a stronger linear relationship between X and Y .
True or false: A correlation analysis test the association between two continuous variables. A. True B....
True or false: A correlation analysis test the association between two continuous variables. A. True B. False
16. The correlation coefficient p between two variables is -0.63 for a sample of 20 observations....
16. The correlation coefficient p between two variables is -0.63 for a sample of 20 observations. The null hypothesis is Ho : p = 0. Which of the following is a correct conclusion based on the data given? Use the 0.05 significance level. A. Reject the null H. There is a negative association between the variables. B. Do not reject the null Ho. There is a negative association between the variables C. Reject the null Ho. There is a positive...
Part I: Determine whether each of the following statements is TRUE or FALSE, and write a...
Part I: Determine whether each of the following statements is TRUE or FALSE, and write a short explanation for your answer The mean and median are always equal to each other and can never be different. The median and mode must always be equal and can never be different. The expected value of a random variable is a weighted average of outcomes, where each outcome is weighted by its probability of occurrence. Regressions are used to estimate the relationship between...
Use the value of the linear correlation coefficient to find the coefficient of determination and the percentage of the total variation that can be explained by the near relationship between the two variables r=0.316 What is the value of the coefficient of determination? 7- (Round to four decimal places as needed.) What is the percentage of the total variation that can be explained by the linear relationship between the two variables? Explained variation - (Round to two decimal places as...
Determine if the following statement is true or false. A correlation coefficient close to 1 is evidence of a cause-and-effect relationship between the two variables. The statement is true O A. False. Only a correlation coefficient close to 0 indicates a cause-and-effect relationship between the two variables O B. False. A correlation coefficient should not be interpreted as a cause-and-effect relationship O c. True, but only if all the conditions for correlation are met. False. A correla.on coefficient of 1...
Use the value of the linear correlation coefficient r to find the coefficient of determination and the percentage of the total variation that can be explained by the linear relationship between the two variables. r 0.301 What is the value of the coefficient of determination? -(Round to four decimal places as needed.)
16. The correlation coefficient p between two variables is -0.63 for a sample of 20 observations. The null hypothesis is Ho : p = 0. Which of the following is a correct conclusion based on the data given? Use the 0.05 significance level. A. Reject the null H. There is a negative association between the variables. B. Do not reject the null Ho. There is a negative association between the variables C. Reject the null Ho. There is a positive...
Most questions answered within 3 hours.
-
A car starts from rest on a curve with a radius of 150 m and
tangential...
asked 2 hours ago -
In Star Wars both the Storm Troopers and Droid Army are
notoriously bad shots. In order...
asked 5 hours ago -
when buffers react with h+ or oh-, do the ratio of conjugate
base to acid and...
asked 6 hours ago -
A population of values has a normal distribution with μ=207.3
and σ=35.8. A random sample of...
asked 6 hours ago -
An unknown solution was treated with H2SO4 and refluxed for 2
hours. The mixture was then...
asked 6 hours ago -
Let x be the age of a licensed driver in years. Let
y be the percentage...
asked 7 hours ago -
System.out.print( "Barrel\t"+"of"+"Laughs" );
asked 7 hours ago -
Need a 1,000 word self explanatory essay on how
characteristics of the functional, matrix & bureaucracy...
asked 7 hours ago -
(Could you explain how I can answer the question and what the
equation I will use)....
asked 7 hours ago -
The ΔGf0 values for HCO3- (aq),
CO32-(aq), and H+(aq) are -587.06,
-528.10 and 0 kJ mol-1,...
asked 7 hours ago -
Southeast Soda Pop, Inc., has a new
fruit drink for which it has high hopes. John...
asked 7 hours ago -
Time (s)
Position (m)
0
0
1
3
2
8
3
15
An object travels along...
asked 8 hours ago