Assignment 1

Assignment 1 - Homework Assignment #1 STAT 231 Banerjee Due...

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Homework Assignment #1 STAT 231 Banerjee Due Date: February 1, 2010 Drop Box: TBA 1) Let X be a discrete random variable that attains values 1, 2 and 5 with probability 1/8, 1/4 and 5/8 respectively. Find: a) E(X); b) Var(X); c) E(2X+3) d) The Standard deviation of 2X+3 2). In order to evaluate the effect of technology in the classroom students in a section of STAT 231 form part of an experiment. The technology involved involves broadcasting the lecture live to another classroom. The lecture is also recorded and can be downloaded for review by any student. Professors at Waterloo want to evaluate this video-conferencing technology to see if it can be used for any course at Waterloo in the future. Evaluation of this section is therefore an experiment, which can help evaluate the technology. It is important to discover if there is a difference in the learning experience between students who attend the lecture in the room with the instructor and those students in the room that receives the broadcast. If there is no difference between the two groups of students then the technology will be used for other courses at Waterloo. The first problem is therefore to discover if there are any differences between the two groups of students. A second related problem is to discover if the ability of students to download lectures for review enhances the learning experience. In order to investigate the first question, during a particular lecture the students in Section 1 are randomly assigned to Room A and Room B. In Room A the lecture is ‘live’, while in B it is broadcast. At the end of the lecture the two groups of students are asked to fill-in a questionnaire designed to evaluate their experience. One of the questions was:
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This note was uploaded on 07/05/2011 for the course STAT 231 taught by Professor Cantremember during the Winter '08 term at Waterloo.

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Assignment 1 - Homework Assignment #1 STAT 231 Banerjee Due...

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