Analysis of Paired Data

Analysis of Paired Data - Analysis of Paired Data The...

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

View Full Document Right Arrow Icon
Analysis of Paired Data The Paired t Test The sample consists of n independently selected items for which a pair of observations is made. We can compute the difference for each pairs and make inferences about the mean of these differences using a one sample t-test. Example 1: Background: Drinking water availability and quality is a world problem. Water quality is monitored in varying degrees. The US EPA monitors water quality at some locations for hazardous contaminants like arsenic, mercury, lead, chromium, and pesticides. Drugs and parasites, such as cryptosporidium are also found in the water supply. The text cites “Trace Metals of South Indian River” Envir. Studies , 1982: 62-66 as source of the following data. River Site Bottom Water Zinc Concentration X Surface Water Zinc Concentration Y Difference D 1 .430 .415 .015 2 .266 .238 .028 3 .567 .390 .177 4 .531 .410 .121 5 .707 .605 .102 6 .716 .609 .107 ± ² .0917 ³ ´ ² µ¶·¶¸
Background image of page 1

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

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 12/20/2011 for the course STAT 344 taught by Professor Staff during the Spring '08 term at George Mason.

Page1 / 5

Analysis of Paired Data - Analysis of Paired Data The...

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