Essays on Statistics

            Because psychology is a science, psychologists must collect data systematically and objectively.  To accomplish this, they use a variety of research methods and each of which as advantages and disadvantages as compared with the others.  These are techniques psychologists use in there research, including naturalistic observation, case studies, surveys, correlational research and experimental research. …

What are the differences among the various measures of variation, such as the range, intrauterine range, variance, standard deviation, and coefficient of variation, and what are the advantages and disadvantages of each? The differences: Range: Range of a data set is deference between the largest and the smallest data value. It is the simplest measure…

In today’s world, we are faced with situations everyday where Statistics can be applied. In general, Statistics is the science of collecting, organizing, and analyzing numerical data. The techniques involved in Statistics are important for the work of many professions, thus the proper preparation and theoretical background of Statistics is valuable for many successful career…

Abstract The role of land in the urban region is multifaceted. Due to the process of urbanization in recent years the land prices are very high in the Metropolitan towns compared to medium-sized towns. This paper discusses the comparative study of the Exponential growth curve, Modified exponential curve, Gompertz curve and Logistic Curve to analyze…

Statistics can be defined as the practice or science that is concerned with the process of collecting and analyzing the numerical data in both large and small quantities. The process is enacted for the purpose of understanding proportions in complete from those in the representative data. Thus, there are several techniques that are used for…

Research objectives are the goals of the research study. Research objectives specify the reason researchers are conducting research. For example, researchers may want to better understand the difference in pain scale results among subjects with a diagnosis of moderate traumatic brain injury. In this case the research objective would cause researchers to take steps to…

In an experiment, researchers measure two types of variables: independent and dependent variables. (a) Which variable is manipulated to create the groups? Independent variable (b) Which variable is measured in each group? Dependent variable 7. Can a nominal variable be numeric? Explain. Yes. Just as described in the textbook (Page 100), numbers on a nominal…

Question 1: What are the assumptions for one way ANOVA? Why are they important for assumption checking? How do you do the assumption checking? (2 references). The analysis of variance or ANOVA was developed by R. A. Fisher and is a test of significance between or among means (Keppel & Wickens, 2004). The purpose of…

Quality Associates, Inc. is a consulting firm who advises its clients about statistical and sampling methods that can be used to control their manufacturing procedures. In this particular case we consider a production line designed to fill bottles of a shampoo with a mean weight of 12 ounces of shampoo per bottle. Quality Associates, Inc….

Forecasting consists of two methods: quantitative and qualitative. The quantitative method displays three different time series applications, such as moving averages, exponential smoothing, and trend regression analysis. All three time series are valuable tools in business applications. This paper will describe the moving averages and identify the business applications and possible limitations of this quantitative…