2- A(n) ______________ variable is one that is not under the control of the researcher but that may be influencing the outcome of the experiment.…
(b) Explain each of the following in terms of water properties (6 points maximum; 2 points for each…
1) Independent variables: Something that is already known and is part of the experiment. The independent variable is something that has been controlled.…
Your independent variable is what is being directly manipulated by the researcher. In this case it would be your study method. Your dependent variable is dependent on the independent variable. If your study is sound, your dependent variable will change as your independent variable changes. So, your dependent variable would be, in this case, the grade on your exam!…
b. Dependent Variable: the variable that I am measuring (it depends on the independent variable)…
4. Rewrite your topic area as a research questions i.e. A hypothesis / or statement?…
If you grow yeast in a sealed test tube filled with water and a food source, do you think these growth conditions are aerobic or anaerobic?…
What is the study hypothesis? If it is not stated, what would you say the hypothesis is? (4)…
In the laboratory experiments, independent variables can be controlled and manipulated however they wish. They can isolate variables and add variables to measure the effect of the dependent variables they are studying. This enables them to make predictions and establish correlations, causal connections and supposed laws between the variables. For example, if the researchers want to find the remedy for a disease for example cancer he or she may isolate the dependent variables and add external elements, the independent variable to see the effect of such action whether or not the independent variable can eliminate the cancer cells.…
When you did your hand wash experiment, you decided a variable to test, say, hot vs cold water, you called this variable an “experimental variable” since it was the variable you were testing experimentally. In order to get meaningful data, you need to keep other things the same, for example the washing time had to be the same for both, you called the washing time a _Control_______ variable.…
* Dependent variable – The variable that is measured to see how it is changed by manipulations in the independent variable.…
3. Obtain three test tubes and measure and place 1 gram of sodium polyacrylate into each.…
Conclusion: If the car start, your hypothesis is correct, if doesn’t need a new hypothesis…
Obsevations (i.e., dependent variables) that occur in one of two possible states, often labelled zero and one. E.g., “improved/not improved” and “completed task/failed to complete task.” Usually an independent or predictor variable that contains values indicating membership in one of several possible categories. E.g., gender (male or female), marital status (married, single, divorced, widowed). The categories are often assigned numerical values used as lables, e.g., 0 = male; 1 = female. Synonym for nominal variable. A variable that obscures the effects of another variable. If one elementary reading teacher used used a phonics textbook in her class and another instructor used a whole language textbook in his class, and students in the two classes were given achievement tests to see how well they read, the independent variables (teacher effectiveness and textbooks) would be confounded. There is no way to determine if differences in reading between the two classes were caused by either or both of the independent variables. A variable that is not restricted to particular values (other than limited by the accuracy of the measuring instrument). E.g., reaction time, neuroticism, IQ. Equal size intervals on different parts of the scale are assumed, if not demonstrated. Synonym for interval variable. An extraneous variable that an investigator does not wish to examine in a study. Thus the investigator controls this variable. Also called a covariate. The presumed effect in a nonexperimental study. The presumed effect in an experimental study. The values of the dependent variable depend upon another variable, the independent variable. Strictly speaking, “dependent variable” should not be used when writing about nonexperimental designs. Synonym for binary variable Variable having only integer values. For example, number of trials need by a student to learn a memorization task.…
7) The variable that causes a measurable effect or change on the dependent variable is…