Which value of r indicates a stronger correlation: r=0.834 or r=−0.914?
Q: A statistician reports that the correlation between two quantitative variables X and Y is r= 0.88.…
A: Solution : Here we have given correlation between two quantitative variables X and Y is 0.88 r ^2 =…
Q: 11. Determine if the following statements are true or false. If false, explain why. a. A correlation…
A: Here, we have -0.90 and 0.50 two correlation coefficients.
Q: R'is the square of the correlation, so both measure the direction of the relationship between two…
A: R-Squared is square of correlation r but they measures different things.
Q: An instructor finds that she cannot predict a student's performance on an exam based on their…
A: The objective of the question is to identify the correlation coefficient that best represents the…
Q: (5) variable summarized in the following histogram, and why? Which measures of center and…
A: The data is a right skewed data containing several outliers which will easily affect the mean value…
Q: Give interpretation of the below?Correlation ρxy≈0
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Q: The correlation for this data is r = -0.8111. Which is the correct interpretation of this value?…
A: It is given that the two variables sea surface temperatures and coral growth per year at locations…
Q: A pediatrician wants to determine the relation that exists between a child's height (x) and head…
A: The data is defined below as follows: From the information, it is clear that Let X denotes the…
Q: Compute the correlation coefficient. x 15 246 y64735 Send data to Excel The correlation coefficient…
A: We have given that, X :- 1, 5, 2, 4, 6 Y:- 6, 4, 7, 3, 5 Then, We will find the correlation…
Q: Assume that you have paired values consisting of heights (in inches) and weights (in lb) from 40…
A: Given Correlation r=0.535
Q: What is the correlation coefficient between the outcome and predictor variables? Is it significant?…
A: The outcome variables are the variable that is obtained as the solution. These are also called…
Q: In a certain class, scores average out to 80 with a SD of 10, as do scores on the final. The…
A: Let, x denotes scores and y denotes final scores.Then, the values are given as-
Q: Gamma hat= 0.36 for the relationship between family income (below average, average, above average)…
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Q: Is y significantly different from -0.5?
A: The coefficient of γ is 74.3, the corresponding standard error is 52.98 and the degrees of freedom…
Q: Use the value of the linear correlation coefficient r to find the coefficient of determination and…
A:
Q: State whether the following statement is true or false: “The correlation between shoe size and…
A: Correlation measures the strength of association. According to the provided information, the…
Q: State the type of correlation between the number of hours students spend studying and the number of…
A: Correlation is the measure of linear association between two quantitative variables. If one…
Q: What would be the predicted stock return for a company whose CEO made $15 million % (Type an integer…
A: We have used the excel data analysis tool to run the regression analysis.
Q: The more hours per week that full-time college students tend to work, the lower their GPA tends to…
A: Let x be the number of hours per week that full-time college students tend to work and y be the GPA…
Q: Describe the error in the conclusion. Given: There is a linear correlation between the number of…
A: Correlation describes only the linear relationship between the two variables, does not imply any…
Q: A random sample of college students was surveyed about how they spend their time each week. The…
A: Correlation is a useful association statistic.
Q: Assume that you have paired values consisting of heights (in inches) and weights (in Ib) from 40…
A: The value of r is 0.563.
Q: the value of the linear correlation coefficient r to find the coefficient of determination and the…
A: Given that Correlation coefficients r is 0.947
Q: What do you mean by positive and negative correlation? Write down the properties of the coefficient…
A: Positive Correlation: If the coefficient of correlation (r) has a positive value, then the…
Q: Use the value of the linear correlation coefficient r to find the coefficient of determination and…
A: From the provided information, Correlation coefficient (r) = 0.853
Q: Which plot indicates a correlation of 0.7? Y & R 8 50 T 10
A: Here, first figure shows negative correlation because trend line goes negative axis.
Q: For a set of correlated data, you calculate that the correlation coefficient (r) is -0.87. What…
A: The question is about regressionIntroduction :R2 measures the % of variation in y variable is…
Q: Using the below data, how will you judge the degree of correlation between the two variables x and…
A: We want to find the correlation
Q: Solve the problem. A olothes shop owner tries to predict the winter oolection sales by displaying…
A: The value of correlation for the variables coat sales and temperature is -0.801. The variable…
Q: choose the correct answer Given r = 0.945, the correlation scale indicates that _______ a. there…
A: choose the correct answer Given r = 0.945, the correlation scale indicates that _______ a. there…
Q: dxdy = 125 Ox = 5 O a. Very low degree of corre O b. No correlation O C. Perfect correlation
A: Correlation = ∑dxdynσxσy =125605*7 =0.05
Q: If you have a correlation (r=.90), the coefficient of determination
A: We have given that Correlation coefficients r =0.90
Q: A correlation of 0.5. The community of having a cat and dog average is 60% and SD = 15. find the…
A: Given information: The average of community having a cat or dog is 60% and the standard deviation is…
Q: Which correlation would allows for the best prediction of Y based on X? Group of answer choices r…
A: We have to find correlation would allows for the best prediction of Y based on X
Q: Suppose that the correlation between height and IQ in children is +0.70. What proportion (or…
A: given data correlation coefficient r = +0.70 proportion of variance explained by the relationship…
Q: Suppose the correlation between height and weight for adults is +0.80. What proportion of the…
A: From the provided information,Correlation between height and weight for adults (r) = +0.80
Q: The correlation between a variable and itself is always equal to 0.5 -1 O 1
A: Correlation: Correlation measure the degree to which two variable are dependent on each other…
Q: Which r is the strongest correlation? O -0.8 O-0.18 O -0.09 O 0.711 O 0.4
A: Correlation coefficient is used to find the relationship between two quantitative variables. The…
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- A random sample of college students was surveyed about how they spend their time each week. The scatterplot below displays the relationship between the number of hours each student typically works per week at a part- or full-time job and the number of hours of television each student typically watches per week. The correlation between these variables is r = –0.63, and the equation we would use to predict hours spent watching TV based on hours spent working is as follows: Predicted hours spent watching TV = 17.21 – 0.23(hours spent working) Since we are using hours spent working to help us predict hours spent watching TV, we’d call hours spent working a(n) __________________ variable and hours spent watching TV a(n) __________________ variable. The correlation coefficient, along with what we see in the scatterplot, tells us that the relationship between the variables has a direction that is _________________ and a strength that is ______________________. According to the…The correlation between hours of sleep and hours of study is r = 0.14. (a) Calculate r². (Round your answer to four decimal places.) ,2 = = (b) Choose a sentence that interprets value r². 1.96% of the variation in hours of sleep is not explained by hours of study. Variation in hours of study explains about 1.96% of the observed variation in hours of sleep. 1.96% of the variation in hours of sleep is not explained by the variation in hours of study. Hours of study explains about 1.96% of the observed variation in hours of sleep.Assume that you have paired values consisting of heights (in inches) and weights (in lb) from 40 randomly selected men. The linear correlation coefficient r is 0.594. Find the value of the coefficient of determination. What practical information does the coefficient of determination provide? Choose the correct answer below. O A. The coefficient of determination is 0.353. 64.7% of the variation is explained by the linear correlation, and 35.3% is explained by other factors. O B. The coefficient of determination is 0.647. 35.3% of the variation is explained by the linear correlation, and 64.7% is explained by other factors. O C. The coefficient of determination is 0.647. 64.7% of the variation is explained by the linear correlation, and 35.3% is explained by other factors. O D. The coefficient of determination is 0.353. 35.3% of the variation is explained by the linear correlation, and 64.7% is explained by other factors.
- Q14Mariam wants to see how the number of absences for a student in her class affects the student’s final grade. The data obtained from a sample are shown. Absences (x)1012208Grade (y)7055968475 Find the correlation coefficient between number of absences and final grade. Round your answer to three decimal places.Rail ridership during the summer months in the North-East is believed to beclosely related to the number of tourists visiting the region. The following tableshows the data on the number of tourists and North-East ridership for the past16 years. (Answer in Excel showing formulas for answers)Year Tourists( in millions) Rail Ridership (in millions) 2000 9 2.32001 4 1.9 2002 7 1.7 2003 5 1.8 2004 12 2.8 2005 13 2.9 2006 14 2.42007 20 4.8 2008 7 1.3 2009 5 1.12010…The following table indicates the ages of a sample of female employees of People Plus Pty, andthe corresponding monthly income of each employee (in thousands of Rands). Age In Years (x) Monthly Income (R000s) (y) 40 43 49 49 32 36 27 31 38 41 46 42 1. By completing the table given below, and then applying the relevant formulae,determine the linear regression function for this bivariate data set. x y x2 xy total If a female employee is 39 years of age, estimate her monthly income
- Use the following to answer the question: ˆy=−4x+10.3 with R2=35%. Which best describes the correlation? Weak negative linear relationship Weak positive linear relationship Moderate negative linear relationship No linear relationship Moderate positive linear relationshipWhich number below is representative of the largest correlation? r = -0.75 r = .05 r = -0.45 r = 0.65Suppose you run research about the relationship between the frequency of smoking and hours of sleep. You used Pearson r and got a coefficient of -0.63. What is your interpretation?
- Which of the following correlations indicates the strongest relationship or association and why? r = .10; r = .03; r = -.35; r = -15Use the following to answer the question: ŷ : = −3x + 13.9 with R² = 34%. Which best describes the correlation? No linear relationship Weak positive linear relationship O Moderate negative linear relationship O Moderate positive linear relationship Weak negative linear relationshipAn instructor finds that she cannot predict a student's performance on an exam based on their attendance at the review session for the exam. This relationship is best reflected in which of the following correlations. r.= +1.00 r= -1.00 r=.50 r = 0.00