STAT 2507 Study Guide - Midterm Guide: Random Variable, Variance, Redone
108 views4 pages
Document Summary
Notes: the formula sheet and the normal table are attached, there are 20 multiple-choice questions in this test, for each question, circle one answer only, each question has 1. 25 marks. Throwing a single fair die 4 times and obtaining 4 ves . Throwing a single fair die 6 times and obtaining at least 5 ves . Throwing 3 fair dice, obtaining 3 ves , followed by the throwing of 9 fair dice, obtaining no ves . The following data represent a sample of 10 scores on a statistics quiz: After the mean, median, range and variance were calculated for the scores, it was discov- ered that one of the three 20"s should have been an 18. Which of the following will change when the calculations are redone using the correct scores? (a) both mean and range (c) both mean and variance (*) (b) only the median (d) both variance and range.