a. Compute the Pearson correlation between the Rater A and Rater B attractiveness ratings. What is the obtained r value? p. Is your obtained r statistically significant (using a =.05, two tailed)? E Are the Rater A and Rater B scores "reliable"? Is there good or poor agreement %3D

1.Consider the accompanying data on and (%) at failure of the cheese. [Note: Theresearchers were Italian and used real mozzarella cheese, not the poor cousin widelyavailable in the United States.]a. Construct a scatter plot.b. What does the plot suggest about the nature of the relationship between the twovariables?c. Calculate coefficient of correlation between x and y. Comment on the result.   2.Scraps of iron were selected on the basis of their densities, x, and their iron contents, y,were measured. The results were as follows:x 2.8 2.9 3.0 3.1 3.2 3.2 3.2 3.3 3.4y 27 23 30 28 30 32 34 33 30(i) Plot the data(Scatter Diagram)9 | P a g e(ii) Find the regression equation of y on x by the method of least squares(iii) Comment on Goodness of fit of the fitted line(iv) Predict y for given x=3.5

There is a negative correlation between the average litres of wine consumed by residents of a country and the incidence of national coronary deaths. Explain why correlation in this case does not imply causation by suggesting a third variable z that explains the correlation. Is z a common response or a confounding variable? Draw a digraph illustrating the between x, y, and z