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Unformatted text preview: Stat 512  Assignment 1 Due Monday, February 1 This assignment pertains to material covered in Lectures 1–7. Please bring hard copy to class on Monday. 1. (Based on Exercise 15.8 in the textbook.) Three high schools participated in a study to evaluate the effectiveness of a new computerbased mathematics curriculum. In each school, four 24student sections of freshman algebra were available for the study. In each school, two sections were randomly selected and assigned to the computerbased curriculum, and the other two sections were given the standard curriculum. At the end of the term, a standardized math achievement test was given to the students in each section. (a) Is this study experiemtal, observational, or mixed experimental and ob servational? Why? (b) Identify the factors and factor levels. Which factors are crossed with/nested within other factors? (c) What type of study design is implemented here? (d) What is the unit of randomization? What is the unit of observation? 2. Explain the difference between a completely randomized (CR) design and a randomized complete block (RCB) design. Then describe how CR and RCBrandomized complete block (RCB) design....
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This note was uploaded on 01/19/2012 for the course STAT 512 taught by Professor John during the Spring '11 term at Peru State.
 Spring '11
 John

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