STA1DCT Assignment 2 Due Thursday the 30th of March 2017 at 3pm. You must submit your assignment electronically and as a single file via the LMS page for this subject. Where appropriate, your solutions must include your workings. In submitting your work, you are consenting that it may be copied and transmitted by the University for the detection of plagiarism. Please start with the following statement of originality, which must be included near the top of your submitted assignment: "This is my own work. I have not copied any of it from anyone else." IMPORTANT NOTE 1: The total possible marks for this assignment is 50. There are 40 marks associated with accuracy (i.e. correctness of your answers; the breakdown of these marks is indicated on this question sheet), a further five marks for completeness (you will only get the full five marks for completeness if you make a serious attempt to answer every question) and a further five marks for your written communication (e.g. clarity, spelling, grammar, correct use of notations etc.) STA1DCT: 40 + 5 + 5 = 50 marks. IMPORTANT NOTE 2: When you are asked to calculate an answer by hand, you may still use your calculator for basic calculations (e.g. multiplication, division, taking a square-root etc.) Your workings should show that you know how a formulae or process works. 1. Consider n = 3 values denoted x1, x2, x3. Throughout this question let 18 1 > 3 3 i=1 denote the average of these values. For this question, you need to match the expression in the left column below with the equivalent expression in the right hand column. For convenience, the expressions on the left are labeled with numbers (e.g. Expression 1, Expression 2, ... ) and the expressions on the right with letters (e.g. Expression A, Expression B, ... ). 3 Expression 1: X i=1 Expression A: 2x 3 Expression 2: X x2 + +2 Expression B: x2 + x3 + x+3 + 3T2 i=1 3 Expression 3: X 2 Expression C: x2 + x2 + 3 + x2 i=1 3 Expression 4: i=1 Y(Xi-x) Expression D: 3x Expression 5: X 3 1 Expression E: 0 3 i=1 To make your answer clear, you are advised to use a format of answer similar to that below. Simply replace the with the name of the correct matching expression from the right hand column. . . . . . . . . . . . . . . . Expression 1 = . . . . . . . . . . . . . . . Expression 2 = . . . . . . . . . . . . . . . Expression 3 = . . . . . . . . . . . . . . . Expression 4 = . . . . . . . . . . . . . . . Expression 5 = . . . . . . . . . . . .