when to use a Pearson’s correlation, the possible research hypotheses for this statistical model, and when correlation can be used to test each type of Research Hypothesis (attributive, associative and causal). 1. A Pearson's correlation is used when you want to find a linear relationship between two variables. It can be used in a causal as well as a associativeresearch hypothesis but it can't be used with a attributive RH because it is univariate. 2. Pearson's correlation should be used only when
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Descriptive Statistics Descriptive statistics involves organizing, summarizing and illustrating statistical data. The objective is to show important characteristics of the data without drawing any conclusions. Inferential statistics involves using a representative subset of data (a sample) in order to draw conclusions about unknown characteristics of an entire set of data (a population). Population: The entire
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correct relationship analysis a. For two interval/ratio variables – use correlation b. For two nominal/ordinal variables – use cross-tabs 4. Does a relationship exist? 5. If relationship exists, determine the direction a. Monotonic will be increasing/decreasing b. Nonmonotonic will be looking for a pattern 6. Assess the strength of relationship a. With correlation – size of coefficient denotes the strength b. With cross-tabs – the pattern
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Experiment 2: Determination of phosphate in water samples by the Ascorbic Acid Reduction Method Introduction: Phosphorus plays specific in many biochemical procedures as it is an essential nutrients for plants at a definite concentration; it is one of the most abundant elements on earth and is commonly found in the form of phosphate such as orthophosphate, hydrolysable phosphate and organic phosphorus compound. One of the key effects of phosphorus is the eutrophication of surface water. This is
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MATLAB® Getting Started Guide R2011b How to Contact MathWorks Web Newsgroup www.mathworks.com/contact_TS.html Technical Support www.mathworks.com comp.soft-sys.matlab suggest@mathworks.com bugs@mathworks.com doc@mathworks.com service@mathworks.com info@mathworks.com Product enhancement suggestions Bug reports Documentation error reports Order status, license renewals, passcodes Sales, pricing, and general information 508-647-7000 (Phone) 508-647-7001 (Fax) The MathWorks, Inc. 3 Apple Hill Drive
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Descriptive and Inferential Statistics ________________________________________ Statistics can be broken into two basic types. The first is known as descriptive statistics. This is a set of methods to describe data that we have collected. Ex. Of 350 randomly selected people in the town of Luserna, Italy, 280 people had the last name Nicolussi. An example of descriptive statistics is the following statement : "80% of these people have the last name Nicolussi." Ex. On the last 3 Sundays, Henry
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analysis that was researched will focus on a span of about 50 years (1963-2010) with childhood obesity being the dependent variable influenced by the independent variables of age, family median household income, and gender, which will show the correlation to childhood obesity. There were eleven samples of years used in the analysis. The years were inclusive of two or more so an average of the years was used for the data in the eleven observations. The most important variable in this research is how
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more than 16 years of education. QUESTION 2 Fig 2.1 Scatter plot of department store and food retail turnover. Figure 2.1 is a scatter plot of the turnovers for food retailing and department stores from 1982-2008. There is a clear upward trend indicating that as food retail turnover has risen department store turnover has also risen. The data follows a fairly distinct trend line with few outliers indicating a strong positive correlation between the two variables. QUESTION 3 Fig 3.1 Pareto
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2. The minimum number of variables represented in a histogram is a.|1| b.|2| c.|3| d.|4| ANS: A PTS: 1 3. Which of the following graphical methods is most appropriate for categorical data? a.|ogive| b.|pie chart| c.|histogram| d.|scatter diagram| ANS: B PTS: 1 4. In a stem-and-leaf display, a.|a single digit is used to define each stem, and a single digit is used to define each leaf| b.|a single digit is used to define each stem, and one or more digits are used to define
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| A Study on ‘Socio-economic Status of Rickshaw Pullers in Dhaka City’ | Course Name- Business Statistics ( F-503) | | Submitted to:Dr. M. Jahangir Alam ChowdhuryProfessorDept. Of FinanceUniversity Of DhakaSubmitted By:Md. Shafiul Azam (ID#26059)Student of ‘Business Statistics’ Spring, 2014EMBA (Finance) ProgramUniversity Of Dhaka Date Of Submission: 30th April 2014 | 1. Introduction The rickshaw is a small-scale local means of transport. It is generally a pedal-driven vehicle i.e. it
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