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Biology 103

by: Isabel Cano

Biology 103 BSC 103

Isabel Cano


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About this Document

week one notes
Biology and Society
DR. Seller
Class Notes
25 ?




Popular in Biology and Society

Popular in Biological Sciences

This 2 page Class Notes was uploaded by Isabel Cano on Thursday January 21, 2016. The Class Notes belongs to BSC 103 at a university taught by DR. Seller in Spring 2016. Since its upload, it has received 8 views.


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Date Created: 01/21/16
Page 1 01/19/16 Chapter 1 What is Science? What is Life? Why do I care? • Amethod to answer questions • Aprocess of using observations and experiments to draw evidence- based conclusions • Away of knowing 01/21/16 Quantitative data: dealing with numbers (measurements, length, depth etc) Qualitative data: about your subject details (appearance) Hypotheses: is a tentative explanation for an observation it is testable and refutable Science is a process: - Making an observation • Start with an interesting, informal observation • often unreliable, untested • Anecdotal evidence: a story something someone saw - Formulate a question - Studying previous research • read relevant literature See current information on the subject of interest • • study peer - reviewed scientific literature - Forming scientific Hypotheses • EX: the bird less likely to be predated upon inside the rock • testable: supported or rejected by carefully designed experiments or non experimental studies • Falsifiable: can be ruled out by data • Not all explanations are scientific hypotheses • An explanation that cannot be tested or refuted, fall outside of science and fall in Pseudoscience (psychics and astrology) • a hypothesis is never proven • if the data supports the hypotheses it will be consider true until proven other wise in the future - Experimentation • Hypothesis can be tested using experimentation • An experiment is a carefully designed test • The results of an experiment either support or rule out a hypothesis • observe and record behavior have a controlled group and experimental group • Controlled group: experience nothing placebo Page 2 • Experimental group: experience the experiment they receive the actual test so either a pill etc. The experimental group experience the independent variable, that is the factor being deliberately changed in the experimental group • The dependent variable is the measure result of an experiment.Analyzed in both the experimental and control groups. • evidence based conclusions can be drawn from results - Drawing Conclusions • Confidence in the conclusions drawn from experimentation is increased by the repetition of the experiment by other scientists • Sample size is important • it is the number of experiment subjects or the number if times an experiment is repeated the larger the sample size, the more likely the results will have statistical significance • • statistical significance is a measure of confidence that the results obtained are “real” rather than due to random chance • Ahypothesis that continues to hold up after many years of rigorous testing may eventually considered a scientific theory (a fact) - Scientific theory • Afact • EX: Germs create bacteria - Finding patterns • some questions cannot be tested through controlled experiments • through careful observations or comparisons of phoneme in nature, scientist can find patterns and help answer questions • Epidemiology is the study of patterns of disease in populations observing patterns can show a consistent relationship or link, between variable • • Correlation between two variable does not prove that one variable causes the other -


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