Standard deviation

report. If the report had a fault, the subject was asked to track their food for another week. Statistical Analysis The analyses were done using R Statistical Software and results were shown as a percentage or median or means plus or minus standard deviation. Results of Findings The findings showed that subjects with a normal BMI had an increase in BMI at the end of the study. All subjects who were considered obese before the gluten free diet were still obese after the gluten free diet. Two…

aspects of the data set you cited in Question 1 define it as “best”? 4. What does “standard deviation” measure? 5. (a) Calculate the standard deviation of the data set you labeled as having the least random error in the first experiment with pure water. (b) Calculate the standard deviation of the data set you labeled as having the MOST random error in the first experiment with pure water. (c) What does the standard deviation tell you about these two data sets? Does that agree with your labels…

Caffeine Impact on Goldfish Metabolism Introduction Metabolism is a process that enable organisms to maintain their life. Metabolism can be measured in numerous parameters. Within this experiment in order to measure the metabolism rate by determined the level of dissolved oxygen. Goldfish is an example of poikilotherm that are organisms that are influenced by the environment surrounding them. Thus, the manipulation of surrounding can influence the metabolism rate due them being ectotherms.…

Introduction In this study the effectiveness of counseling methods was tested in a group of 20 middle and high school students at an alternative school. These students from a Southeastern metropolitan area were selected as a direct result of their inability to appropriately interact with peers and staff in their home school. This study classifies fights as; arguments, and or physical acts of aggression towards staff or other students. The study analyzed males and females between the ages of…

refers to how far apart the data points are in relation to the mean. It is helpful when calculating the probability of future events. Standard deviation is a measure of how spread out numbers are and we use the variance of data to calculate it. In order to calculate the standard deviation you take the square root of the sample variance. The combination of standard deviation and mean will allow you to know the majority of data sample. It’s important to understand there is a hierarchy in the…

A mixture sample of females and males could have possibly provided a difference in the results. The tool to examine the collected was through the SPSS 21. The tools were measured by the percentage, mean, standard deviation, and t-test. The mean values were used to infer the results under three categories: Below Average = (0-0.67), Average = (0.68-1.33), and Above Average = (1.34-2.0). These values were given in a number to indicate the students’ ability of Chemistry…

motion. The velocity is used in the equation to determine acceleration, therefore, the graphs end up looking similar to each other (both trend lines tend to increase when moving rightward). The standard deviation for velocity is calculated to be 2.26 ± 0.8023 m/s. On the other hand, the standard deviation for acceleration is 5.566 ± 0.4453 m/s2. In addition to that, the accelerations from each testing height are also compared to the theoretical acceleration (9.8 m/s2). The lowest percent error…

Abstract The purpose of this study was to investigate whether different colour tones of red and green affected sweetness perception. An experimental design was engaged where 95 first-year Psychology students voluntarily sampled four 20mL coloured liquids and rated their sweetness on a scale of 1-10, with 1 being no sweetness distinguished and 10 where the liquid was extremely sweet. The major results indicated that light red samples were perceived sweeter than dark red, and that light green…

For example, if σ = 45% and ρ = 0.2, then the standard deviation with 50 stocks would be 20.91%, and would rise to 22.05% when only 20 stocks are held. Such an increase might be acceptable if the expected return is increased sufficiently. Hennessy could contain the increase in risk by making sure that he maintains reasonable diversification among the 20 stocks that remain in his portfolio. This entails maintaining a low correlation among the remaining stocks. For example, in part (a), with ρ = 0…

recorded for only two years i.e., in 2008 and 2011. Maximum return was recorded in Monday in the year 2009 and minimum return was recorded day is also Monday in the year 2009. This shows some significance to the Monday’s return distribution. High standard deviations are seen in the…