Biological Science
5th Edition
ISBN: 9780321862167
Author: Scott Freeman
Publisher: PEARSON
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Chapter 1, Problem 12TYU
Summary Introduction
To review:
The reason behind the proposal of the null hypothesis in addition to research hypothesis while designing an experiment.
Introduction:
Whenever an experiment is proposed, a hypothesis is given which states the possible outcome of that experiment. The hypothesis is then proved correct or incorrect by conducting experiments. On the other hand, a null hypothesis states that there is no statistical difference between the two measured variables in an experiment. It is denoted by
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Chapter 1 Solutions
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- What is a null hypothesis in experiments? How is a null hypothesis used in science experiments? Note: Provide an answer with 150-200 wordsarrow_forwardWhy do scientists develop a hypothesis before conducting research?arrow_forwardCreate an experiment. Point out problem/questions, hypothesis, controlled variables, independent variables, and dependent variablesarrow_forward
- Which are the most conventional type of experiment involves three major pairs of components?arrow_forwardIn 3-4 sentences, explain the difference between a null hypothesis and an alternate hypothesis. Then, give an example of each--in other words, make up a null hypothesis and an alternate hypothesis for a hypothetical experiment.arrow_forwardWhy is there a need for the researcher to formulate a hypothesis in his study?arrow_forward
- If I set up a Chi square analysis and determine that I cannot reject the null hypothesis based on my data, but the null hypothesis should be rejected, what kind of error is that? a. Type II error b. Type I error c. Conservative errorarrow_forwardYou observe that every time your neighbor, who always wears a yellow hat, walks out his front door, he gets dive bombed by a crow. From this observation, what is a testable hypothesis? What is your prediction based on your hypothesis? Please design an experiment to test this hypothesis and prediction. You must identify the independent and dependent variables, as well as at least 2 control variables, and your experiment must contain an experimental group and a control grouparrow_forwarda) Does the data support your hypothesis? b) How could you improve this experiment? Consider the other factors you could have / should have controlled in this experiment.arrow_forward
- Why is it important to have a control for an experiment?arrow_forwardCompare and contrast random and systematic experimental errors with specific examples either real or fictitious. Explain how these types of errors can be identified and reduced in an experiment.arrow_forwardhow do you write an effective, good, null and alternative hypothesis?arrow_forward
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