15. Now the researcher (Dani) is interested in whether size of an object (x) predicts familiarity (y) with that object. This time, however, he collects ratings for a sample of 90 words, using the same methods, with the following characteristics: E(x - )2 = 300.3 E(y-y)2 = 27.8 E(x - x)(y-y) = -26.65 a. What is the correlation coefficient (r) for the relationship between these two variables? Is this relationship positive or negative? Strong, moderate, or weak? b. What is the proportion of variance in familiarity explained by noun size? c. Is size a significant predictor of familiarity? Conduct a test of this hypothesis