![]() Comparing mean average or median numbers of objects, observing trends of increasing or decreasing numbers, comparing modes or numbers of items that occur most frequently are just a few examples of quantitative analysis.īesides analyzing data on tables or charts, graphs can be used to make a picture of the data. There are many observations that can be made when looking at a data table. Recording data on a table or chart makes it much easier to observe relationships and trends. In student terms, this is called “looking for patterns in the data.” Did the change I made have an effect that can be measured? The goal of data analysis is to determine if there is a relationship between the independent and dependent variables. Using technology, such as spreadsheets, to organize the data can make it easily accessible to add to and edit.Īfter data has been collected, the next step is to analyze it. Organizing data will be helpful for identifying relationships later when making an analysis. Describes physical properties such as how something looks, feels, smells, tastes, or sounds.Īs data is collected it can be organized into lists and tables.May involve the use of a scale such as in the example below.Uses standard metric units (For instance, meters and centimeters for length, grams for mass, and degrees Celsius for volume.Involves tools such as rulers, timers, graduated cylinders, etc.Uses numbers to describe the amount of something.There are two types of data that may be collected-quantitative data and qualitative data. Making a rough sketch or recording notes of the investigation set up is helpful if the experiment is to be repeated in the future.Ĭarrying out the investigation involves data collection. Tie back loose hair so that it does not get caught on any of the equipment. Wear protective clothing such as goggles and gloves.For example, some chemicals should not be mixed together or put down a sink drain. Determine how to dispose of materials.Locate the nearest sink or fire extinguisher as a safety precaution.The use of construction tools or potentially harmful chemicals will require adult supervision.The LocationĬhoose a low traffic area to reduce the risk of someone accidentally tampering with the investigation results-especially if the investigation lasts for several weeks.Īvoid harmful accidents by using safe practices. When setting up the investigation, consider. Are there any steps missing? Double check the materials list to be sure all to the necessary materials are included.Īfter designing the experiment and gathering the materials, it is time to set up and to carry out the investigation. ![]() Ask someone else to read the procedure to make sure the steps are clear. Will the data be gathered in one sitting or over the course of several weeks?Ĭheck the work. List the steps needed to carry out the investigation.Įstimate the time it will take to complete the investigation. Make a list of materials that will be used in the investigation. Stain fading over time for combinations of detergents and stains Type of cloth, physical process of stain removal The dependent variable is the variable that changes as a result of /or in response to the independent variable.Ĭlarify the variables involved in the investigation by developing a table such as the one below.Controlled variables are variables that are kept the same each time.The independent variable is the one variable the investigator chooses to change.There are three types of variables to consider when designing the investigation procedure. A well-designed investigation contains procedures that take into account all of the factors that could impact the results of the investigation. Once a hypothesis has been formulated, it is time to design a procedure to test it.
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