How to write a null hypothesis in a lab report

A good setup is shown below Example Title Influence of pH, temperature, and concentration on amylase activity by: Author's Name Date Abstract Writing the abstract is pretty easy, there is an introduction sentence, then explain what you did in the experiment in the next few sentences and conclude with your results sentences.

Lab report format

Age has no effect on mathematical ability. You may include some background information that is relevant to your question of study, explaining why the question or topic is of significance. The table should include a title. If the null hypothesis is not rejected, why might this be discuss other possible alternative explanations, experimental design flaws, or incorrect assumptions? The methods section can be written as separate paragraphs for each different experimental set up you had to perform or can be split off into subsections each with its own subtitle. For the factors that were examined it was predicted that as amylase concentration decreases the enzyme function decreases as measured by the rate of starch digestion. In addition to presentations of your data, a written description of the results is necessary in which you summarize the results illustrated in each Table or Figure. Examples of the Null Hypothesis To write a null hypothesis, first start by asking a question. Keep in mind, even if the confidence level is high, there is still a small chance the null hypothesis is not true, perhaps because the experimenter did not account for a critical factor or because of chance. Should they have been taken at specific time intervals? With these results having no clear explanation, a second trial was set up using a fresh batch of I2KI, new amylase enzyme, and a new starch solution. Do teens use cell phones to access the internet more than adults? This was repeated for all 6 tubes and the respective times were recorded. In fact, it is often one of the first steps toward further inquiry.

The importance of enzyme inhibition was studied in an experiment in which Inhibition of starch digestion by alpha-amylase inhibitor reduced the efficiency of utilization of dietary proteins and lipids and slowed the growth of rats.

Write your hypothesis in a way that reflects this.

Lab report background example

Journal of Biotechnology 94 2 : Figures As mentioned earlier, figures can be incorporated into the body of the lab report as you reference them in text, or they can be added at the end of a lab report separately to help with formatting issues that could occur if they were cited in-text. Activity was measured by measuring the rate of disappearance of starch using I2KI, a color changing indicator that becomes purple in the presence of starch. The title summarizes information presented in the Introduction and Results section of the report. For example, in the fish and Elodea experiment, pH may change very little due to co-occurrence of photosynthesis and respiration. A title should consist of a few well-chosen words, ten or less, that accurately reflect the scope of your report. A good setup is shown below Example Title Influence of pH, temperature, and concentration on amylase activity by: Author's Name Date Abstract Writing the abstract is pretty easy, there is an introduction sentence, then explain what you did in the experiment in the next few sentences and conclude with your results sentences. Results: In the Results section state what the data and analyses show. Interpret your results in light of your own knowledge and information in the literature. Title: The title states the subject of the laboratory. In fact, it is often one of the first steps toward further inquiry.

A scatter graph is appropriate when the dependent variable is numerical e. Example Introduction The kinetics of a reaction, its rate, is usually established by measuring the amount of substrate consumed or the amount of products formed as a function of time.

How to write null hypothesis in word

As part of the discussion, write a few paragraphs that address the following questions: Does the data support the null hypothesis or the alternative hypothesis? They ARE your results and need to be discussed. Describe how you conducted the study and include variables that were controlled i. You may include some background information that is relevant to your question of study, explaining why the question or topic is of significance. You must clearly and concisely tell your reader what are the most important trends summarized by each of your tables and graphs. This is one reason why it's important to repeat experiments. The second part of your Introduction is a statement of your hypothesis es.

It makes formatting easier. The effect of concentration, pH, and temperature on amylase activity was examined to determine how these factors affect enzyme activity. For example, in the fish and Elodea experiment, pH may change very little due to co-occurrence of photosynthesis and respiration.

how to write a hypothesis

Don't be afraid to speculate in this section but make sure it is clear to the reader what is speculation and what is not.

Helmenstine holds a Ph. It should clearly describe the experimental situation, the control situation sand the type of observations you made. How might you further test these explanations? Do you think this sample size is adequate? Instead time measurements were taken every 10 seconds as in the first two experiments.

Where does the hypothesis go in a lab report

The table should include a title. However, in all cases the sample ran out before the I2KI could start turning yellow. It is known that amylase functions optimally at a pH of 6. You are also writing a hypothesis and telling your reader what that hypothesis is. When were the samples taken? Do not explain results or discuss them here. The results suggest that as concentration of amylase decreases, the rate of starch digestion decreases.
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Null Hypothesis