quiz02_3 - MASSACHUSETTS INSTITUTE OF TECHNOLOGY Department...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: MASSACHUSETTS INSTITUTE OF TECHNOLOGY Department of Civil and Environmental Engineering 1.017 Computing and Data Analysis for Environmental Applications Quiz 3 Tuesday, December 10, 2002 Please answer all questions on a separate piece(s) of paper with your name clearly identified: Problem 1 ( 15 points) A field survey attempts to relate nitrogen runoff (in 1000 kg/year) in a small watershed to 2 factors: A) pesticide use (none, light, moderate, or heavy) and B) soil type (sandy, sand-silt, silty clay, or clay). Answer the following questions about the two-way ANOVA table given below: Source SS df MS=SS/df F p Factor A 0.0403 3 0.0134 0.6992 0.5661 Factor B 0.3044 3 0.1015 5.2856 0.0100 Interaction AB 0.3265 9 0.0363 1.8896 0.1278 Error 0.3072 16 0.0192 Total 0.9783 31 1. Which, if any, of the two factors contributes significantly to nitrogen runoff? Why? 2. Are interactions between factors A and B significant? Why? Problem 2 ( 15 points) Species diversity indices are frequently used to measure the health of natural ecosystems. Suppose that you are given the following two sets of unitless diversity indices for a control site and a site affected by human activity: Control: 2.72 1.98 8.13 0.42 4.17 6.66 Affected: 2.78 3.02 0.93 3.21 Use the normal probability plot provided at the end of this quiz to determine the...
View Full Document

This note was uploaded on 11/29/2011 for the course CIVIL 1.00 taught by Professor Georgekocur during the Spring '05 term at MIT.

Page1 / 4

quiz02_3 - MASSACHUSETTS INSTITUTE OF TECHNOLOGY Department...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online