Kon 18. For 100 students of a class, the regression equation of marks in Statistics (X) on the matistics is 4/9th of the variance of marks in Commerce. Find the mean marks in Statistics and the

Q: Arianna gathered data about the distance of 20 cities from the equator and the average hours of…

A: In this question, we need to find the type of correlation.

Q: If the correlation coefficient between number of years of experience of an employee and the monthly…

A: The correlation coefficient between number of years of experience of an employee and the monthly…

Q: How do you calculate a coefficient of correlation of two indexes’ returns?

A: Let the two indexes’ returns be A and B.The coefficient of correlation measures the degree to which…

Q: The line of regression of marks in Statistics (X) on marks in Accountancy (Y) for a kE of 50…

A:

Q: What does it mean when the correlation coefficient of variables A and B is -0.5?

A: The correlation coefficient of variables A and B is -0.5.

Q: researcher computes the correlation coefficient r= -0.1389 for an explanatory and response variable.…

A: The correlation coefficient(r)=-0.1389

Q: The correlation coefficient always moves between 0 and 1. True or False.

A: The correlation coefficient can be negative, zero or positive.

Q: The table below gives the age and bone density for five randomly selected women. Using this data,…

A: SOLUTION The regression equation is ŷ = b0+b1x X Y X*Y X² Y² 40 357 14280 1600…

Q: For a set of negatively correlated data, you calculate that 7% of the variation in the dependent…

A: Suppose the given data set is negatively correlated.The coefficient of determination: .

Q: Explain what it means when a correlation between the variables X and Y have anr2of 0.72.

A: The value of R2 is 0.72.

Q: How is the number of degrees of freedom available for estimating , the variance of ε, related to the…

A: Let n be total number of variables       k be number of independent variables

Q: In linear regression, the mean value of all residuals will be greater for a correlation of -.70 than…

A: The mean (or expected) value of all residuals will be greater for correlation of -0.70 than for a…

Q: The manager of a sports stadium analyzed the cost of the tickets (x) and the amount of money spent…

A:

Q: True or false: the correlation coefficient between height in inches and height in centimeters is 1.

A:

Q: Interpret the coefficient of correlation “r” in your word

A: The coefficient of correlation is a unitless measure of the strength of the linear relationship…

Q: The manager of a DVD rental store analyzed the number of DVD rentals (y) to the number of weeks the…

A: Correlation: Correlation says about if two variables are related to each other or there exists no…

Q: A researcher is interested in the correlation between number of past romantic partners X and current…

A: The question is about regression Given : Coefficient of non determination = 0.78   To find : % of…

Q: When rs = 0.3 and x = 10. It was later discovered that the difference in ranks in two subjects by…

A:

Q: Give an example of a scatter plot with 5 points that has a correlation of r=0 on the axes below. How…

A: The number of observations is n = 5.

Q: The correlation coefficient betweem anxiaty and exam scorea of the students is -0.6 .so what is the…

A: Here correlation coefficient is negative. Therefore as exam score increases anxiaty decreases.  60℅…

Q: A correlation of 0.95 for two variables X and Y implies that if X increases, there is a 95% chance…

A: Correlation is employed to estimate the linear relationship between the variables X and Y. Here the…

Q: Find r2 if the correlation coefficient is 0.92.   Only round your final answer to 2 decimal places.

A: Given: correlation coefficient r=0.92  Then calculate the coefficient of determination (r2) ??

Q: Use the following to answer the question: y^=-4.2x+9.5 with R2=9%. Which best describes the…

A: y^ =-4.2x+9.5 with R2 =9%

Q: What would be the effect of an "outlier " on a correlation /regression analysis ? It will tend to…

A: An outlier is a data point that is significantly different from the other data points in a dataset.…

Q: What is the coefficient of correlation given this data: X = 51, 42, 34, 10, -1 Y = 59, 30, 24, 19,…

A:

Q: A correlation of r = – 0.95 is stronger than r = + 0.70.

A: Given that  correlation r=-0.95 and r=0.70

Q: The correlation coefficient ranges from which two values?

A: The correlation coefficient ranges from which two values

Q: Find the variance

A: Given : X~N(0, 7)

Q: general, how is the magnitude of the standard error of estimate related to the value of the…

A: Correlation coefficient measure the degree of linear relationship between two variables

Q: True or False: If the correlation coefficient from two variables X and Y , the number of shark…

A: From the known information, a change in one variable affects the change in another variable. Which…

Q: we can conclude from correlation calculation that one variable caused the other variable. True or…

A: Correlation between two variables measure the strength and direction between two variables. It…

Q: if the slope is negative then is the correlation coefficient also negative?

A: Given: the slope of the regression line is -ve then the correlation coefficient is -ve.