1. construct a scatter plot for the variables 2. compute the value of the correlation coefficient...
1. construct a scatter plot for the variables
2. compute the value of the correlation coefficient
3. give an explanation of the type nof relationship that exists between the two variables.
The explanation should be a short paragraph. In this paragraph inclue the following:
*say whether the is a strong positiv elinear correlation, weak positive linear correlation, strong ngative linear correlation, weak negative correlation, or no linear correlation between the two variables.
*explain how you can see this from the scatter plot an from the value you found for the correlation coefficient.
*Interpret this relationship in the context of the problem.
The director of an alumni association for a small college wants to determine whether there is any type of relationship between the amount of an alumnus’s contribution and the years the alumnus has been out of school
| YEARS, X | 1 | 5 | 3 | 10 | 7 | 6 |
| CONTRIBUTION, Y | $450 | $100 | $300 | $200 | $400 | $250 |
Homework Answers
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1. construct a scatter plot for the variables
2. compute the value of the correlation coefficient...
For the following data (a) display the data in a scatter plot, (b) calculate the correlation...
For the following data (a) display the data in a scatter plot, (b) calculate the correlation coefficient r, and (c) make a conclusion about the type of correlation. The ages (in years) of 6 children and the number of words in their vocabulary Age, x 1. 2 3 4 5 6 Vocabulary size, y 500 450 1350 1750 2300 2300 (a) Choose the correct scatter plot below. A. B. c. D. 2350+.. 7 2350- 2350- Vocabulary Age Vocabulary Vocabulary ....
For the following data (a) display the data in a scatter plot, (b) calculate the sample...
For the following data (a) display the data in a scatter plot, (b) calculate the sample correlation coefficient r, and (c) make a conclusion about the type of correlation. Use technology. The earnings per share (in dollars) and the dividends per share (in dollars) for six medical supplies companies in a recent year are shown in the data set below. a) choose the correct scatter plot. Use technology. (b) The correlation coefficient r is _____ (Round to three decimal places...
For the following data (a) display the data in a scatter plot, (b) calculate the sample correla...
For the following data (a) display the data in a scatter plot, (b) calculate the sample correlation coefficient r, and (c) make a conclusion about the type of correlation. Use technology. The earnings per share (in dollars) and the dividends per share (in dollars) for six medical supplies companies in a recent year are shown in the data set below. a) choose the correct scatter plot. Use technology. (b) The correlation coefficient r is _____ (Round to three decimal places...
QUESTION 6 Suppose the correlation coefficient between two variables is found to be -0.94. Which of...
QUESTION 6 Suppose the correlation coefficient between two variables is found to be -0.94. Which of the following statements are true? there is a strong tendency for small values of one variable to be associated with large values of the other variable there is a weak negative relationship between the variables a scatter plot of the data points would show a clear downward trend there is a strong tendency for low values of one variable to be paired with low...
Degree of Correlation For each plot use one of the terms in the word bank to...
Degree of Correlation For each plot use one of the terms in the word bank to describe the plot. Word Bank: strong positive, weak positive, strong negative, moderate negative, weak negative, no. Plot A show a linear relationship between variables x and y. Plot B show a linear relationship between variables x and y. Plot C show a linear relationship between variables x and y. Plot D show a linear relationship between variables x and y. Plot E show a...
[3-6] Correlation is a measure of the direction and strength of the linear (straight-line) associ...
Intro to Stats
Q1:
Q2:
[3-6] Correlation is a measure of the direction and strength of the linear (straight-line) association between two quantitative variables. The analysis of data from a study found that the scatter plot between two variables, x and y, appeared to show a straight-line relationship and the correlation (r) was calculated to be -0.84. This tells us that there is little reason to believe that the two variables have a linear association relationship all of the data...
Scatter plots are used to discover relationships between variables. Using the corresponding measurements of variable 1...
Scatter plots are used to discover relationships between variables. Using the corresponding measurements of variable 1 and variables 2 in DATA, plot variable 1 vs. variable 2 and describe the correlation between variable 1 and variable 2. variable1 variable2 -0.21582 0.89369 0.56997 -0.72620 -0.54850 -0.09185 -0.12385 0.50086 0.06975 -0.73607 0.16327 0.88498 -0.72595 -0.27512 0.22500 0.62647 -0.40463 0.92432 0.67652 0.56368 -0.82322 0.73005 0.06747 -0.74824 0.74055 0.79412 -0.71577 -0.04509 -0.82231 -0.70951 -0.47603 0.01573 0.58094 0.51169 -0.58573 0.10376 0.19003 -0.90089 -0.49528 0.04767 0.93083...
14. Multiple Choice Variables x and y have a correlation coefficient of r = 0.89. Which...
14. Multiple Choice Variables x and y have a correlation coefficient of r = 0.89. Which statement is best? a. There is a strong positive association between x and y and a straight line fit to the data cannot be substantially improved by fitting a curve to the data. b. There is a strong positive association between x and y and a straight line fit to the data can certainly be substantially improved by fitting a curve to the data....
For the following data (a) display the data in a scatter plot, (b) calculate the correlation...
For the following data (a) display the data in a scatter plot, (b) calculate the correlation coefficient r, and (c) make a conclusion about the type of correlation. The ages (in years) of 6 children and the number of words in their vocabulary Age, x 1 2 3 4 5 6 Vocabulary size, y 300 450 1500 1500 2300 2400 a Ag Vocab Vocab Vocabi . 2450 Vocabulary Age Age Age (b) The correlation coefficient r is (Round to three...
What does a correlation coefficient of 0 indicate? Choose the correct answer below. O A. There...
What does a correlation coefficient of 0 indicate? Choose the correct answer below. O A. There is no linear relationship between the two quantitative variables. O B. There is a weak relationship between the two quantitative variables. O C. It indicates a calculation error, as the correlation coefficient cannot be 0. O D. There is a strong relationship between the two quantitative variables. O E. It indicates a non-linear relationship between the two quantitative variables.
For the following data (a) display the data in a scatter plot, (b) calculate the correlation coefficient r, and (c) make a conclusion about the type of correlation. The ages (in years) of 6 children and the number of words in their vocabulary Age, x 1. 2 3 4 5 6 Vocabulary size, y 500 450 1350 1750 2300 2300 (a) Choose the correct scatter plot below. A. B. c. D. 2350+.. 7 2350- 2350- Vocabulary Age Vocabulary Vocabulary ....
QUESTION 6 Suppose the correlation coefficient between two variables is found to be -0.94. Which of the following statements are true? there is a strong tendency for small values of one variable to be associated with large values of the other variable there is a weak negative relationship between the variables a scatter plot of the data points would show a clear downward trend there is a strong tendency for low values of one variable to be paired with low...
Degree of Correlation For each plot use one of the terms in the word bank to describe the plot. Word Bank: strong positive, weak positive, strong negative, moderate negative, weak negative, no. Plot A show a linear relationship between variables x and y. Plot B show a linear relationship between variables x and y. Plot C show a linear relationship between variables x and y. Plot D show a linear relationship between variables x and y. Plot E show a...
Intro to Stats
Q1:
Q2:
[3-6] Correlation is a measure of the direction and strength of the linear (straight-line) association between two quantitative variables. The analysis of data from a study found that the scatter plot between two variables, x and y, appeared to show a straight-line relationship and the correlation (r) was calculated to be -0.84. This tells us that there is little reason to believe that the two variables have a linear association relationship all of the data...
14. Multiple Choice Variables x and y have a correlation coefficient of r = 0.89. Which statement is best? a. There is a strong positive association between x and y and a straight line fit to the data cannot be substantially improved by fitting a curve to the data. b. There is a strong positive association between x and y and a straight line fit to the data can certainly be substantially improved by fitting a curve to the data....
For the following data (a) display the data in a scatter plot, (b) calculate the correlation coefficient r, and (c) make a conclusion about the type of correlation. The ages (in years) of 6 children and the number of words in their vocabulary Age, x 1 2 3 4 5 6 Vocabulary size, y 300 450 1500 1500 2300 2400 a Ag Vocab Vocab Vocabi . 2450 Vocabulary Age Age Age (b) The correlation coefficient r is (Round to three...
What does a correlation coefficient of 0 indicate? Choose the correct answer below. O A. There is no linear relationship between the two quantitative variables. O B. There is a weak relationship between the two quantitative variables. O C. It indicates a calculation error, as the correlation coefficient cannot be 0. O D. There is a strong relationship between the two quantitative variables. O E. It indicates a non-linear relationship between the two quantitative variables.
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