Spearman's rank correlation coefficient

to 6.557% of S&P 500 as of today. From 2011 until today we see that our portfolio has had, return-wise, a similar performance to the S&P 500 with around 11% annual returns. Also, the correlation coefficient of 0.85 tells us that our portfolio is highly correlated to the S&P 500 index. Both returns and correlation can be explained by our stock picks. WFM, AAPL, XOM, C, and JWN have significant weights in the S&P 500 index. Interestingly, our portfolio had volatility of 1.23%, measured by…

psychologists is correlation. Correlations provide data that enables psychologists to answer questions that have not been answered before. Correlation method is defined as “A research method used to examine relationships between variables, which are expressed in the form of a statistical measure called a correlation coefficients” (Nevid,201,p24). Unlike an experiment where one variable is dependent and the other is independent, both variables in a correlation remain constant. For each…

the “blood” after 60 minutes a calibration curve had to be created by making up seven different solutions of eosin (11,25 μg ml-1) and water to compare it against their absorbance that was calculated in a spectrophotometer. Figure 1 shows this correlation. It is clearly evident that the higher the concentration of eosin in a test tube, the higher the absorbance of that test tube will be. It shows that absorbance is directly proportional to concentration. This…

individual well-being and happiness. Due to this increase there have been multitudes of theories and studies conducted to determine appropriate interventions to assist individuals well-being. This essay will focus on gratitude intervention and its correlation with well-being. This essay will use empirical evidence to prove the link between gratitude and subjective well-being. This essay will also give clear insight into intervention assessment, test scoring, as well as discussing the detailed…

self-defeating humor score, the lower the usage of humor as a coping strategy. However, the results of the present study do not support the idea of a negative correlation. Instead, there is a weak, but significant positive correlation between self-defeating humor and the use of humor as a coping strategy, rather than the negative correlation between the two measures. Based on these results, if an individual’s score on the HSQ is high for self-defeating humor, then they also have a high score…

In the following two studies, Vrij and Mann (2001) and Mann, Vrij, and Bull (2004), respectively, researched police officers abilities to detect deception in real-life, high-stakes scenarios. They also looked at the behavioural cues which were used to come to these conclusions. In the first study by Vrij and Mann (2001), participants were comprised of 52 police officers in the Netherlands, 28 male and 24 female. The officers had an average age of 30, around 9 years of service, and rated…

1. QUESTION: Class, what does the correlation coefficients of -1, +1, and 0 tells you about the relationship between the two variables? It depends on the method one uses, but the Pearson correlation coefficient is the most widely used. Values in the form of numbers show the direction and how strong the relationship is between two different variables. These can range from -1.00 up to +1.00. If it is positive it is a direct relationship. For example, if one increases the other will also increase…

interest (continuous), two correlations tests were performed. Hypothesis One: Correlations Test A sample of n = 63 subjects was obtained with scores on Communication Apprehension (M = 3.00, SD = 1.54) and Academic Performance (M = 2.13, SD = .96). It was hypothesized that Communication Apprehension would correlate negatively with Academic Performance.…

Introduction Employee engagement is a workplace tactic that brings about the ideal conditions for all associates of an organization to: excel each day, commit to their companies’ goals, and be driven to contribute to the organization’s success. Employee engagement can be measured and can vary from poor to great. Nurturing employee engagement in the workplace can also deepen communication between members of an organization and increase the overall productivity. The purpose of this study is to…

Bumberry et al. (1978) addressed this issue by calculating a Pearson product-moment correlation coefficient between primary (i.e. structured interview used for over 2 decades) and secondary raters (i.e. board certified psychiatrists with 9 and 4 years of experience). Researchers found that inter-rater reliability between the primary psychiatrist and the two other psychiatrists was .62. Because the reliability coefficient is relatively high, we can assume that the BDI is a reliable test to assess…