Non-parametric statistics

The Competitive State Anxiety Inventory-2 Revised (CSAI-2R), is one of the most frequently used instruments in the evaluation of situational anxiety in sports competition. Objectives: The objective of this study was to validate the Tunisian version based on the French version of the Competitive State Anxiety Inventory-2 Revised (CSAI-2R), including the direction and the frequency scales. Method: 418 athletes ranging in age from 14 to 34 years in different individual and team competitions,…

Carpi and Egger’s reading “Uncertainty, Error, and Confidence” discusses how there will always be a small portion of error in all scientist’s works. However, there are two different types of error: statistical and systematic and the main difference between the two is that statistical error is random and systematic error can be compensated for during an experiment. Scientists do not report just a single value as a measurement due to these types of errors in experiments, they report a certain…

only research design that allows researchers to infer causation is experimental designs. Therefore, in order to prove (or disprove) a causal relationship between vitamins and crime rates, an experiment must be designed. One of the key principles in statistics is “correlation does not equal causation.” Any two independent variables could happen to be correlated, but that does not show a cause-and-effect relationship between the two variables. The two variables researched through a…

primary research question: To what extent does SES explain the differences between school district student achievement in the State of Connecticut on Common Core-aligned assessments? Results and Conclusions We begin by reporting the descriptive statistics that show the percent of districts and students that are the subject of analysis. [Insert Table 1] We then present the measures of central tendency by grade for both subjects on the SBA. [Insert Table 2] The main research question dealt…

Analyses were conducted to compare the effects the media has on the body image. The study has found significant difference in the way in which the media impacts body image. In the course of the study there was a group of categories form to help distinguish the effects the media has on the body. These included “do you at some point in your day watch TV, go on the Internet, read or look at magazines” correlated with: how do you feel about your body (general), how do you feel about your…

In the next step, the graded response IRT model will be analyzed again for each identified domain, but without the excluded items, and the model fit statistics will be assessed. If the model has a good fit statistics, the best item for each domain will be selected according to the distribution of the threshold values across the latent scale and the discrimination value; item that has threshold values cross the whole latent scale and high discrimination value will be selected. Sample Size Graded…

¥ For how many students do you have Verbal Aggressiveness scores? We have Verbal Aggressiveness scores for 59 students. ¥ What is the mean for the entire sample? The mean for the entire sample is 44.0169. ¥ How do you interpret the mean score? When we interpret the mean score, we should look at the minimum and the maximum scores, so we can see the mean are close to each one. In verbal aggressiveness, the minimum is 26 and the maximum is 65, which indicates that the mean around the middle of…

The overall intent of the oral assessment center is to score the candidate based on a set of measureable dimensions. These dimensions can range from problem solving and decision making to technical knowledge and experience. However, these wide ranging dimensions call into question the validity of an assessment center to measure dimensions. Moreover, some literature calls into question the ability of the assessment center to measure dimensions at all (John P. Meriac, 2014). Additionally, the…

Temporal outliers are common trajectories that follow the populated route, but with an important difference of the speed compared to the other common trajectories. For extracting such type of outliers, we make use of the average speed used by the moving objects in the populated route, we make comparison between each sub-trajectory from the common trajectories and the average speed for all common trajectories that traverse the same route with some tolerance, and we extract two essential types;…

In the experiment conducted by W. Scott Terry, they set out to find out whether the placement of a commercial in a set of commercials would impact the ability for a person to recall the specific commercials and specific details from said commercials. They wanted to know whether there would be primacy or recency effect when recalling information. The serial position for the capability to recall the commercials under naturalistic conditions was an important factor for how people were able to…