Which of the figure shows the greatest degree of correlation between X and Y? What makes...
Which of the figure shows the greatest degree of correlation between X and Y? What makes you think so?
Homework Answers
A value of exactly 1.0 means there is a perfect positive
relationship between the two variables. For a positive increase in
one variable, there is also a positive increase in the second
variable.
The strength of the relationship varies in degree based on the
value of the correlation coefficient. For example, a value of 0.2
shows there is a positive correlation between two variables, but it
is weak and likely unimportant. Analysts in some fields of study do
not consider correlations important until the value surpasses at
least 0.8. However, a correlation coefficient with an absolute
value of 0.9 or greater would represent a very strong
relationship.
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Which of the figure shows the greatest degree of correlation
between X and Y? What makes...
Which of the following statements about the correlation, r, between Y and X is NOT true?...
Which of the following statements about the correlation, r, between Y and X is NOT true? A. r measures the strength of the linear association between Y and X. B. r does not provide any information about the strength of non-linear relationships. C. r = 0 means there is no relationship between Y and X. D. Calculating r is not appropriate if the distributions of Y and X are skewed with outliers.
For the least-squares equation y = - x + 1, the correlation between x and y...
For the least-squares equation y = - x + 1, the correlation between x and y is ________ . Which of the following best fills in the blank? Answers: A) -1 B) negative C) +1 D) positive
The figure shows the schematic of a vehicular jack which is to be designed to support a load, W. ...
The figure shows the schematic of a vehicular jack which is to be designed to support a load, W. The links are to be made of A36 structural square tubing, w -40 x 40 x 5 mm. Each link is 300 mm between the centers of the pins, /. Assume each member is centrically loaded Ignore pin holes and stress concentrations. Use nd- 2 a) When 0-70°, determine the greatest allowable load W that can be applied to the jack...
What is the correlation between X and Y? Round your answer to 3 decimal places. X...
What is the correlation between X and Y? Round your answer to 3 decimal places. X 37 22 27 35 36, Y 107 90 72 85 95
The value of r obtained by calculating the correlation between X and Y is the same...
The value of r obtained by calculating the correlation between X and Y is the same as the correlation between Y and X. A. True B. False
4.he sample correlation coefficient between X and Y, rxy Sx/Sx S where S-the covariance between X...
4.he sample correlation coefficient between X and Y, rxy Sx/Sx S where S-the covariance between X and Ys Σ(X-XM) (-Yu)/ n-1 Sx the standard deviation of X and Sy the standard deviation of Y I) If the covariance is positive, the correlation coefficient must be positive: True or False? ii) If the covariance is negative, the correlation coefficient must be positive: True or False? a) ii) The correlation coefficient must lie between 0 and 1. True or False? v)lf the...
Question 7 (Unit 9) 10 marks Figure 2 shows a scatterplot of r and y values...
Question 7 (Unit 9) 10 marks Figure 2 shows a scatterplot of r and y values for each of 100 data points in a sample 2 2 3 X Figure 2 The correlation coefficient associated with Figure 2 is claimed to be -0.9. (a) Is the value claimed for the correlation coefficient plausible in terms of its sign? Justify your answer [2] (b) Is the value claimed for the correlation coefficient plausible in terms of its closeness to -1? Justify...
Based on the three scatter plots, which show correlations between two variables X and Y, which...
Based on the three scatter plots, which show correlations
between two variables X and Y, which one of the following
statements is correct?
The relative magnitude of the three correlations is a < b
< c.
The relative magnitude of the three correlations is a = b <
c..
Scatter plot a shows a strong positive correlation
Scatter plot c shows a weak positive correlation.
a)If there is a strong correlation between two variables X and Y, can it be said...
a)If there is a strong correlation between two variables X and Y, can it be said that X causes Y or that Y causes X? Why or why not? b)Discuss what is meant by the term robust and how this concept relates to power.
HELP ASAP For the data set below, calculate the correlation between X and Y to three...
HELP ASAP
For the data set below, calculate the correlation between X and Y to three (3) decimal places. To Use Excel's CORREL Function 1). Open up the worksheet above and select a blank cell you might need to click "Enable Editing" to select a cell). 2). Type -CORRELL 3). For "arrayı, select the column of values for one of the variables. Remember, for correlation that it does not matter which variable you call "X" and which you call "Y."...
The figure shows the schematic of a vehicular jack which is to be designed to support a load, W. The links are to be made of A36 structural square tubing, w -40 x 40 x 5 mm. Each link is 300 mm between the centers of the pins, /. Assume each member is centrically loaded Ignore pin holes and stress concentrations. Use nd- 2 a) When 0-70°, determine the greatest allowable load W that can be applied to the jack...
4.he sample correlation coefficient between X and Y, rxy Sx/Sx S where S-the covariance between X and Ys Σ(X-XM) (-Yu)/ n-1 Sx the standard deviation of X and Sy the standard deviation of Y I) If the covariance is positive, the correlation coefficient must be positive: True or False? ii) If the covariance is negative, the correlation coefficient must be positive: True or False? a) ii) The correlation coefficient must lie between 0 and 1. True or False? v)lf the...
Question 7 (Unit 9) 10 marks Figure 2 shows a scatterplot of r and y values for each of 100 data points in a sample 2 2 3 X Figure 2 The correlation coefficient associated with Figure 2 is claimed to be -0.9. (a) Is the value claimed for the correlation coefficient plausible in terms of its sign? Justify your answer [2] (b) Is the value claimed for the correlation coefficient plausible in terms of its closeness to -1? Justify...
Based on the three scatter plots, which show correlations
between two variables X and Y, which one of the following
statements is correct?
The relative magnitude of the three correlations is a < b
< c.
The relative magnitude of the three correlations is a = b <
c..
Scatter plot a shows a strong positive correlation
Scatter plot c shows a weak positive correlation.
HELP ASAP
For the data set below, calculate the correlation between X and Y to three (3) decimal places. To Use Excel's CORREL Function 1). Open up the worksheet above and select a blank cell you might need to click "Enable Editing" to select a cell). 2). Type -CORRELL 3). For "arrayı, select the column of values for one of the variables. Remember, for correlation that it does not matter which variable you call "X" and which you call "Y."...
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