2. (14pts) In 2018, students in countries all over the world took the PISA exam for Mathematics. These data represent the average scores for a random sample of countries. Average a. (0.5pt each) Find the following (Give 3 decimal places, where needed) Math Score Mean Median Mode n (points) 568 197 438 St. Dev. Variance Min Max 431 525 390 Q1 Q3 QR 507 Range 534 501 401 412 b. (1pt) Lower Fence: 452 490 366 c. (1pt) Upper Fence: 499 515 d. (1pt) Comparing the mean and median, this distribution appears to be (Circle one) Skewed Left Symmetric Skewed Right e. (2pts) The U.S. had an average PISA Math Exam score of 480, what is its z-score? (Give 3 decimal places, show formula, substitution, and result) f. (3pts) Interpret the mean and standard deviation in the context of the situation