What can Pearson Correlation Coefficient and Spearman Correlation Coefficient determine on hardness; Ca and MG? 1.(CA:...
What can Pearson Correlation Coefficient and Spearman Correlation Coefficient determine on hardness; Ca and MG?
1.(CA: 2.452968196)
2.(MG: 4.096579237)
does these correlation coefficients make sense?
Homework Answers
No, the correlation coefficients doesn't make sense as they both are greater than 1 and we all know that the correlation coefficients can have value between -1 and 1. But here they are above 1, so they dont make any sense
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What can Pearson Correlation Coefficient and Spearman
Correlation Coefficient determine on hardness; Ca and MG?
1.(CA:...
Q7. What is the coefficient of determination? Q11. State which correlation coefficient (Pearson, ...
Q7. What is the coefficient of determination? Q11. State which correlation coefficient (Pearson, Spearman, point-biserial, or phi) should be used given the following information. Both factors are interval or ratio scale. Both factors are ranked. One factor is dichotomous, and the other factor is continuous. Both factors are dichotomous. Q13. State whether each of the following is an example of a positive correlation or a negative correlation. Higher education level is associated with a larger annual income. Increased testosterone is...
Using your completed table, you can calculate the Spearman correlation in two different ways. One way...
Using your completed table, you can calculate the Spearman correlation in two different ways. One way is to use the Pearson correlation formula on the ranks of the data. When you do this, you get rs - -0.62. The second way to calculate the Spearman correlation is to use the following formula: Is = 1 - 62D2 n(n2 - 1) In this formula, D represents the difference between ranks for each individual. Using this formula, you get rs - -0.51....
13. If the sum of differences for 5 observations as following , hence, Spearman Correlation coefficient...
13. If the sum of differences for 5 observations as following , hence, Spearman Correlation coefficient = (2 Points) d2 = 40 O 0.5 0.95 O-1
Determine the Pearson product-moment correlation coefficient for the following data. x 1 10 9 6 4...
Determine the Pearson product-moment correlation coefficient for the following data. x 1 10 9 6 4 3 2 y 9 4 4 5 7 7 10 (Do not round the intermediate values. Round your answer to 3 decimal places.) Correlation coefficient, r
Which of the following is FALSE about Correlations: We can use the Pearson Correlation Coefficient when...
Which of the following is FALSE about Correlations: We can use the Pearson Correlation Coefficient when both variables are measured on an interval or ratio scale A correlation examines the relation between two variables The Pearson Correlation Coefficient describes the relation between two variables in terms of the strength and direction of the relationship. A correlation implies causation
Determine the Pearson product-moment correlation coefficient for the following data. x 1 12 9 7 4...
Determine the Pearson product-moment correlation coefficient for the following data. x 1 12 9 7 4 3 2 y 8 4 6 5 7 7 9
Hardness in groundwater is due to the presence of metal ions, primarily Mg^2+ and Ca^2+. Hardness...
Hardness in groundwater is due to the presence of metal ions, primarily Mg^2+ and Ca^2+. Hardness is generally reported as ppm CaCOj or mmol/L Ca^2+. To measure water hardness, a sample of groundwater is titrated with EDTA, a chelating agent, in the presence of the indicator eriochrome black T, symbolized here as In. Eriochrome black T, a weaker chelating agent than EDTA, is red in the presence of Ca2* and turns blue when Ca2* is removed. Ca(ln)^2+ + EDTA rightarrow...
The Pearson r Correlation Coefficient was r = .50. Use this information to answer Qs. 9...
The Pearson r Correlation Coefficient was r = .50. Use this information to answer Qs. 9 – 11 Q9) What is the Coefficient of Determination? Answer: Q10) What is the Coefficient of Non-Determination? Answer: Q11) What type of data does the Pearson r use? Answer:
5. Calculating the Pearson correlation and the coefficient of determination
5. Calculating the Pearson correlation and the coefficient of determinationSuppose you are interested in seeing whether the total number of days students are absent from high school correlates with their grades. You obtain school records that list the total absences and average grades (on a percentage scale) for 80 graduating seniors.You decide to use the computational formula to calculate the Pearson correlation between the total number of absences and average grades. To do so, you call the total number of...
4.7 Let r'n be the Pearson correlation coefficient from a sample size of n. It is...
4.7 Let r'n be the Pearson correlation coefficient from a sample size of n. It is known that rn is asymptotically distributed as N (p, (1 – p2)2/n), where p is the population correlation coefficient. Show that Fisher's Z-transformation Z = { In((1 + ra)/(1 – in)) is actually a variance-stabilizing transformation.
Using your completed table, you can calculate the Spearman correlation in two different ways. One way is to use the Pearson correlation formula on the ranks of the data. When you do this, you get rs - -0.62. The second way to calculate the Spearman correlation is to use the following formula: Is = 1 - 62D2 n(n2 - 1) In this formula, D represents the difference between ranks for each individual. Using this formula, you get rs - -0.51....
13. If the sum of differences for 5 observations as following , hence, Spearman Correlation coefficient = (2 Points) d2 = 40 O 0.5 0.95 O-1
Hardness in groundwater is due to the presence of metal ions, primarily Mg^2+ and Ca^2+. Hardness is generally reported as ppm CaCOj or mmol/L Ca^2+. To measure water hardness, a sample of groundwater is titrated with EDTA, a chelating agent, in the presence of the indicator eriochrome black T, symbolized here as In. Eriochrome black T, a weaker chelating agent than EDTA, is red in the presence of Ca2* and turns blue when Ca2* is removed. Ca(ln)^2+ + EDTA rightarrow...
5. Calculating the Pearson correlation and the coefficient of determinationSuppose you are interested in seeing whether the total number of days students are absent from high school correlates with their grades. You obtain school records that list the total absences and average grades (on a percentage scale) for 80 graduating seniors.You decide to use the computational formula to calculate the Pearson correlation between the total number of absences and average grades. To do so, you call the total number of...
4.7 Let r'n be the Pearson correlation coefficient from a sample size of n. It is known that rn is asymptotically distributed as N (p, (1 – p2)2/n), where p is the population correlation coefficient. Show that Fisher's Z-transformation Z = { In((1 + ra)/(1 – in)) is actually a variance-stabilizing transformation.
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