Lab Exam 1 Review - Section 1 Scientific Method and...

Info iconThis preview shows pages 1–23. Sign up to view the full content.

View Full Document Right Arrow Icon
Section 1 Scientific Method and Statistics
Background image of page 1

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

View Full DocumentRight Arrow Icon
Statistical Evaluation and the Chi Square Analysis (X 2 ) Null hypothesis = assumes no real difference between measured and expected values, therefore How good is the “fit” between these values If the fit is imperfect, how much deviation is allowed Chi Square Analysis = evaluation of deviation and sample size Value used to evaluate deviation and expectation due to chance X 2 = total of (observed - expected) 2 expected
Background image of page 2
Statistical Evaluation and the Chi Square Analysis (X 2 ) p value = probability of obtaining observed deviation by chance alone, therefore the larger the p value, the closer the data are to ideal values. Standard utilized: p value < 0.05 -----> reject null hypothesis p value > 0.05 -----> fail to reject null hypothesis "Degrees of Freedom” ( df ). The df is one less than the number of different outcomes possible . These simple steps must be followed to determine p , utilizing the graph.
Background image of page 3

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

View Full DocumentRight Arrow Icon
Review 1. What is the hypothesis about the weight of 100 seeds? 2. What is the importance of large sample size? 3. What is Chi Square Analysis ? Value used to evaluate deviation and expectation due to chance 4. What is p value ? probability of obtaining observed deviation by chance alone, therefore the larger the p value, the closer the data are to ideal values 5. If p value < 0.05, reject null hypothesis or fail to reject null hypothesis? 6. Chi-square? White 3 5 non-white 7 5
Background image of page 4
This is the term that describes the curved liquid on a graduated cylinder at which you read volume.
Background image of page 5

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

View Full DocumentRight Arrow Icon
What is the MENISCUS
Background image of page 6
This is the type of analysis we performed using the following items:
Background image of page 7

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

View Full DocumentRight Arrow Icon
What is CHI SQUARE
Background image of page 8
This is the Chi Square equation.
Background image of page 9

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

View Full DocumentRight Arrow Icon
What is X 2 = total of (observed - expected) 2 expected
Background image of page 10
Using the following formula, this is the X 2 value for a null hypothesis of an expected 1:1 ratio of white vs. non-white in the experiment below. (O-E) 2 E X 2 = total of 20 random beads are drawn from a bag containing ½ white and ½ red beads.
Background image of page 11

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

View Full DocumentRight Arrow Icon
What is 0.2 (or 2/10 or 1/5)
Background image of page 12
Knowing X 2 and degrees of freedom, this is the value that you can find using this chart.
Background image of page 13

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

View Full DocumentRight Arrow Icon
What is the P VALUE
Background image of page 14
This number represents the degrees of freedom of a coin flip.
Background image of page 15

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

View Full DocumentRight Arrow Icon
What is ONE
Background image of page 16
Section 2 Chemical Concepts and Organic Molecules
Background image of page 17

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

View Full DocumentRight Arrow Icon
Biological Molecules Carbohydrates: reducing sugars monosaccharides, disaccharides, polysaccharides, starch Proteins: 20 amino acids Lipids: insoluble in water Nucleic acids: DNA and RNA
Background image of page 18
Carbohydrates Monosaccharide
Background image of page 19

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

View Full DocumentRight Arrow Icon
Dehydration Synthesis and Hydrolysis To form by removing water To break apart with water
Background image of page 20
Carbohydrates Disaccharide - Sucrose
Background image of page 21

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

View Full DocumentRight Arrow Icon
Identification of Biological Molecules Utilizing Solutions X, Y, and Z Benedict's test for reducing sugars pos. = orange neg. = light blue Iodine test for starch pos. = black neg. = amber Biuret test for protein pos. = violet neg. = light blue Sudan IV test for lipids pos. = confluent red solution neg. = suspension of reagent (insoluble)
Background image of page 22
Image of page 23
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 03/18/2011 for the course BIOLOGY 1103 taught by Professor Blaustein during the Fall '09 term at Georgia State University, Atlanta.

Page1 / 102

Lab Exam 1 Review - Section 1 Scientific Method and...

This preview shows document pages 1 - 23. Sign up to view the full document.

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