Identify the appropriate statistic used to answer questions 21 - 23 21. (1pt) What is the typical score in the heavily skewed distribution of house prices? a. Inter-quartile range b. Median c. Mean d. Standard deviation 22. (1pt) What is the direction and strength of a linear relationship? a. Modified r-squared b. t-statistic c. F-statistic d. Correlation coefficient 23. (1pt) What % of the dependent variable is predicted by the independent variable? a. Correlation coefficient b. r-squared c. p-value d. F-statistic