setup a predictive equation involving variable 1 and variable 2. First, you plot the data below...
setup a predictive equation involving variable 1 and variable 2. First, you plot the data below to determine if linear regression applies. variable1 -0.21582 0.56997 -0.54850 -0.12385 0.06975 0.16327 -0.72595 0.22500 -0.40463 0.67652 -0.82322 0.06747 0.74055 -0.71577 -0.82231 -0.47603 0.58094 -0.58573 0.19003 -0.49528 0.93083 0.61389 -0.91742 -0.60957 variable2 0.89369 -0.72620 -0.09185 0.50086 -0.73607 0.88498 -0.27512 0.62647 0.92432 0.56368 0.73005 -0.74824 0.79412 -0.04509 -0.70951 0.01573 0.51169 0.10376 -0.90089 0.04767 -0.16886 -0.65529 0.25296 -0.24747 Choose your answer from the following: a) The relationship is linear, negative and strong b) The strength of the relationship is moderate, linear and positive c) The strength of the relationship is moderate, linear and negative d) There is no relationship or the strength of the relationship is very weak e) The strength of the relationship is strong but it is not linear f) None of the answers accurately characterize the data g) The relationship is linear, positive and strong
Homework Answers
option d is correct Pearson correlation of variable1 and variable 2 = -0.008
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setup a predictive equation involving variable 1 and variable 2.
First, you plot the data below...
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...
Below are four bivariate data sets and the scatter plot for each. (Note that each scatter...
Below are four bivariate data sets and the scatter plot for each. (Note that each scatter plot is displayed on the same scale.) Each data set is made up of sample values drawn from a population. 2.0 3.0 3.0 3.0 mo Figure 1.0 7.5 : 201 9.2 3.0 6.9 4. 05. 5. 0 8 .2 EAN Hool 6.0 46 1 7.8 9. 0 6 .2 20.0145 Figure Answer the following questions. The same response may be the correct answer for...
8-10 S. Bell recorded data and used her graphing calculator to find the equation for the...
8-10
S. Bell recorded data and used her graphing calculator to find the equation for the line of best fit. She then used the correlation coefficient to determine the strength of the linear fit. Which correlation coefficient represents the strongest linear relationship? 1) 0.9 2) 0.5 3) -0.3 4) -0.8 9. The results of a linear regression are shown below. y- ax+b a-1.15785 b-139.3171772 r--0.896557832 20.8038159461 Which phrase best describes the relationship between x and y? 1) strong negative correlation...
sseument Part& Pretected Viei)Word Mailings Review View Help Tell me what you want to do Enable Editing ruses. Unless you need to edit, it's safer to stay in Protected View 1. Two va...
sseument Part& Pretected Viei)Word Mailings Review View Help Tell me what you want to do Enable Editing ruses. Unless you need to edit, it's safer to stay in Protected View 1. Two variables have a strong negative correlation. Which of the following statements is not true? a. the dependent variable decreases as the independent variable increases b. the trend of the data exhibits an irregular decline c. the line of best fit has a negative slope d. most data points...
Data on pollution and cost of medical care for elderly people are shown here. The following...
Data on pollution and cost of medical care for elderly people are shown here. The following data give a measure of pollution (micrograms of particulate matter per cubic meter of air) and the cost of medical care per person over age 65 for six geographic regions of the United States Cost of Medical Region North Upper South 31.8 Deep South 32.1 West South Big Sky West Pollution Care 924 900 977 981 961 908 30.0 26.8 30.4 40.0 The equation...
2. Given the data in the table below, answer questions a) 40 e) rainfall (mm) (runoff...
2. Given the data in the table below, answer questions a) 40 e) rainfall (mm) (runoff (mm) 0 0 0 0 O 0 0 0 0 150 200 a) create a scatter plot using these data b) determine the linear regression equation and correlation coeficient include details from the method you used to find the equation: Excel Geodebra, or open office file image of graphing calculator or manual calculations () is this a positive or negative correlation? is ita weak...
Part II 19. The gas mileage of an automobile first increases and then decreases as the...
Part II 19. The gas mileage of an automobile first increases and then decreases as the speed increases. Suppose that this relationship is very regular, as shown by the following data on speed (miles per hour) and mileage (miles per gallon): Speed 30 40 50 60 70 Mileage 20 24 26 24 20 SPD 4 Mileage (a) Make a scatterplot of mileage versus speed. Mileage vs Speed Mileage 30 40 60 70 50 Speed 80 stenester even though there is...
Do beavers benefit beetles? Researchers laid out 23 circular plots, each 4 meters in diameter, in...
Do beavers benefit beetles? Researchers laid out 23 circular plots, each 4 meters in diameter, in an area where beavers were cutting down cottonwood trees. In each plot, they counted the number of stumps from trees cut by beavers and the number of clusters of beetle larvae. Ecologists think that the new sprouts from stumps are more tender than other cottonwood growth, so that beetles prefer them. If so, more stumps should produce more beetle larvae. The table contains the...
Consider the following Excel regression output of Data Analysis (picture is autornaic) SUMMARY OUTPUT six data points on a restaurant bill and corresponding tip Bill Line Fit Plot 0.828159148 R Squa...
Consider the following Excel regression output of Data Analysis (picture is autornaic) SUMMARY OUTPUT six data points on a restaurant bill and corresponding tip Bill Line Fit Plot 0.828159148 R Square 0.685847574 0.607309468 Adjusted R Square Standerd Error Predicted Tip 15e 100 ANOVA 0.041756749 93.1383292 42.66200414 135.8003333 93 1383292 10.60550103 8.732672652 Total Upper 95% tener 95% Prok 0933934844 0.041756749 Error 10.58103503 0.288243157 1.27559337 0.008985139 0.347279172 0.148614148 3.936081495 0.050290571 -0.06822967 2.955109584 Bitl (e) Positive correlation of 0.83 -strong corlation. Percentage of...
A sample of 75 undergraduates were asked to participate in a study to investigate the relationship...
A sample of 75 undergraduates were asked to participate in a study to investigate the relationship between a person's grip strength (in newtons) and their forearm circumference (in centimeters). The following plot shows a scatterplot of these data. 24 26 28 30 Forearm.Circumference What is the most correct interpretation of this plot? OThere is a no clear relationship between grip strength and forearm circumference OThere is a weak negative relationship between grip strength and forearm circumference OThere is a moderate...
Below are four bivariate data sets and the scatter plot for each. (Note that each scatter plot is displayed on the same scale.) Each data set is made up of sample values drawn from a population. 2.0 3.0 3.0 3.0 mo Figure 1.0 7.5 : 201 9.2 3.0 6.9 4. 05. 5. 0 8 .2 EAN Hool 6.0 46 1 7.8 9. 0 6 .2 20.0145 Figure Answer the following questions. The same response may be the correct answer for...
8-10
S. Bell recorded data and used her graphing calculator to find the equation for the line of best fit. She then used the correlation coefficient to determine the strength of the linear fit. Which correlation coefficient represents the strongest linear relationship? 1) 0.9 2) 0.5 3) -0.3 4) -0.8 9. The results of a linear regression are shown below. y- ax+b a-1.15785 b-139.3171772 r--0.896557832 20.8038159461 Which phrase best describes the relationship between x and y? 1) strong negative correlation...
sseument Part& Pretected Viei)Word Mailings Review View Help Tell me what you want to do Enable Editing ruses. Unless you need to edit, it's safer to stay in Protected View 1. Two variables have a strong negative correlation. Which of the following statements is not true? a. the dependent variable decreases as the independent variable increases b. the trend of the data exhibits an irregular decline c. the line of best fit has a negative slope d. most data points...
Data on pollution and cost of medical care for elderly people are shown here. The following data give a measure of pollution (micrograms of particulate matter per cubic meter of air) and the cost of medical care per person over age 65 for six geographic regions of the United States Cost of Medical Region North Upper South 31.8 Deep South 32.1 West South Big Sky West Pollution Care 924 900 977 981 961 908 30.0 26.8 30.4 40.0 The equation...
2. Given the data in the table below, answer questions a) 40 e) rainfall (mm) (runoff (mm) 0 0 0 0 O 0 0 0 0 150 200 a) create a scatter plot using these data b) determine the linear regression equation and correlation coeficient include details from the method you used to find the equation: Excel Geodebra, or open office file image of graphing calculator or manual calculations () is this a positive or negative correlation? is ita weak...
Part II 19. The gas mileage of an automobile first increases and then decreases as the speed increases. Suppose that this relationship is very regular, as shown by the following data on speed (miles per hour) and mileage (miles per gallon): Speed 30 40 50 60 70 Mileage 20 24 26 24 20 SPD 4 Mileage (a) Make a scatterplot of mileage versus speed. Mileage vs Speed Mileage 30 40 60 70 50 Speed 80 stenester even though there is...
Do beavers benefit beetles? Researchers laid out 23 circular plots, each 4 meters in diameter, in an area where beavers were cutting down cottonwood trees. In each plot, they counted the number of stumps from trees cut by beavers and the number of clusters of beetle larvae. Ecologists think that the new sprouts from stumps are more tender than other cottonwood growth, so that beetles prefer them. If so, more stumps should produce more beetle larvae. The table contains the...
Consider the following Excel regression output of Data Analysis (picture is autornaic) SUMMARY OUTPUT six data points on a restaurant bill and corresponding tip Bill Line Fit Plot 0.828159148 R Square 0.685847574 0.607309468 Adjusted R Square Standerd Error Predicted Tip 15e 100 ANOVA 0.041756749 93.1383292 42.66200414 135.8003333 93 1383292 10.60550103 8.732672652 Total Upper 95% tener 95% Prok 0933934844 0.041756749 Error 10.58103503 0.288243157 1.27559337 0.008985139 0.347279172 0.148614148 3.936081495 0.050290571 -0.06822967 2.955109584 Bitl (e) Positive correlation of 0.83 -strong corlation. Percentage of...
A sample of 75 undergraduates were asked to participate in a study to investigate the relationship between a person's grip strength (in newtons) and their forearm circumference (in centimeters). The following plot shows a scatterplot of these data. 24 26 28 30 Forearm.Circumference What is the most correct interpretation of this plot? OThere is a no clear relationship between grip strength and forearm circumference OThere is a weak negative relationship between grip strength and forearm circumference OThere is a moderate...
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