Data Types Quiz

The observational method is done by observing and collecting data which is then used to describe the behavior. The researcher observes the events in a natural setting so none of the variables are manipulated. There must be interjudge reliability, meaning that when different researchers administer the same test to the same subject they each must obtain the same measurement. The advantages in this method is that it is the simplest method, it has greater accuracy, and it is useful for setting up hypothesis. The weaknesses are that this method is hard to observe because of privacy and secrecy. It is great for explanation but not as good for prediction and description. The observer might also be biased being that he has his own opinion on what is right and wrong.

There are several parts to the experiment such as both the independent and dependent variables. The independent variable is controlled or changed during the experiment to test the effects on the dependent variable. The dependent variable is tested and measured during the test .A controlled variable is an example for an independent variable would be variable that is held constant throughout the experiment. An example is a theory that could extend a person’s life expectancy. The independent variable is the amount of vitamin given to the subject within the experiment. The dependent variable is the life span

A correlation test is done to show the correlation between the manipulated and responding variables of this experiment.

In terms of the variables in this experiment, what type of relationship was being tested?

In our Penny Lab, we wanted to extend what we were told to do with experimental design. We’re doing this because we wanted to prove what he thought our hypothesis had been, and a hypothesis can not be true unless it can be tested. We investigated what variables made the Penny Lab easier, or harder. As a class we decided to investigate variables like, dropping the penny from the same height, and applying the same pressure to the penny for each drop. But first we had to know what variables were, and which variables we needed to use in the experiment. The variables were, the independent variable, dependent variable, the experimental group, and the control group. We investigated this to show how much water a penny could hold, but we introduced

Describe the experimental method, state its advantages and disadvantages, and distinguish between independent and dependent variables.

Describe the experimental method, state its advantages and disadvantages, and distinguish between independent and dependent variables.

Instructions: This is a group activity that you will start in class and complete at home. For each of the following, note, whether the research design used is an experiment, a quasi-experiment, or a correlational approach and why. If a study is an experiment, identify the independent variable and the dependent variable. Please type your answers in complete sentences.

The study was experimental because: 1) the researchers did manipulate the independent variables, and 2) Participants were randomly assigned to one of two groups.

The scientific question of the project was, Does the size of a tire affect the bike’s speed? The hypothesis was , If the smaller tires were used, then the bike would go faster. The important procedures were: Make sure all equipment is ready. Test the standard wheel of 1 rotation or pedal a second to ride to the finish line. Test smaller and bigger wheels. Record data and have at least 3 trials. Record the data on a piece of paper and compare results to your hypothesis. The Independent variable is the size of the wheel on the bike. The Dependent variable is the standard wheel or tire on the bike. The control group was the bike’s speed and the standard wheel or tire. The Experimental group is the other tires or wheels being tested on the bike. The control variables were the rate of pedaling , the same bike model was used, and the same distance for

The experiment that was present in the article was experimental, in which they were trying to prove if the closure of a song was influenced by the ending of a s ing through 3 conditions they used; cold end and fade out. Researchers were also looking into the difference in the tap-along behavior. The variables that were present in the experiment was the song ending; that had the levels of cold end with and without ritardando, and fade out which were the independent variables and they were manipulated. The dependent variable was the tapping behavior which was measured. The procedure that was issued in the experiment included in having participants that were music majors, they had learn on how to use a tapping machine, they had to listen to a

Experimental designs can be utilize with other researchers, some may have a different effect or others can have the same result. Three major types of experiments are independent and dependent variable, pretesting and post testing, last experimental and control group. Independent variable causes issues that are present or absent, while dependent shows the effect. Pretesting and post testing is the before and after testing of the dependent variable, in the book written by Maxfield and Babbie they test the use of alcohol. For pretesting they ask question on how frequent an individual drink alcohol, before post testing them, they shows a video on the effects of alcohol to see if each individual changes their response in the end. Some researchers like to have a little control, which brings us to

-Identify the variable, control and the factors that will be kept constant. The experimental procedure whould take no longer than 30 minutes.

True experimental research design includes random selection and group assignment of participants, manipulation of variables and observing the effect that the manipulation has on the dependant variable to establish whether a cause and effect relationship is present between the variables (Follmer Greenhoot, 2003, pp. 92-93). An example of a commonly used true experimental research designs, are experiments used for testing the effects of new pharmaceuticals.

The back to back stem and leaf plot shows that both sets of data ar3e negatively skewed. This shows that the majority of values in both sets of data are at the lower end of numbers given. The box and whisker plots confirm this showing that the bottom 25% of values is 0 for ATSI students and 5 or less for non-ATSI students. From looking at the box and whisker plot it indicates that non-ATSI students do engage in more social interaction with friends. This is shown through a larger range and each quartile other than 1 being a higher number. The range of the middle 50% for ATSI is 23 (0-23), whereas for non-ATSI’s it is 17 (5-22). Whilst a bigger IQR is evident for ATSI’s the first quartile value is a lot lower that the first