WK 4- Team A Descriptive Statistics Paper

WK 4- Team A Descriptive Statistics Paper - Descriptive...

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Descriptive Statistics Descriptive Statistics Team A: Rodney Cook, Michelle Mahon, Ginny Carter, Leesajean Meader, and Delfina Bernabe University of Phoenix RES 341- Research and Evaluation I Dr. Hadi Razavi July 2, 2007 1
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Descriptive Statistics Descriptive Statistics All transportation methods consume gasoline. This forum obtained gasoline prices from various cities and survey 43 people of diverse backgrounds to gain insight of escalating gasoline prices and affects on consumers. Measurements of central tendency determine the center of distribution and consumption in the gasoline industry; these measurements include the mean, median, and mode of collected data. Monitoring measurement of dispersion by gaining the range, variance, and standard deviation provides useful information. The range determines the most expensive and least expensive prices for each of the different octane levels of gasoline and diesel. Variance is a better measure of the mean, with the exception of measuring money and measuring large deviations. This paper’s purpose examines the measures of central tendency and dispersion of data collected for the purposes of examining the effects of high gasoline pricing on consumers. The paper includes graphic displays of collected data and an explanation of the information displayed will be included. The paper discusses which measures were most appropriate to draw conclusions based upon parameters associated with the particular problem of gasoline pricing effects on consumers. Measures of Central Tendency and Dispersion In mathematics, an average, mean, or central tendency of a data set refers to the “middle” measurement value of a dataset. Previously, the team explained the gathering primary and secondary data process and used methods of frequency distribution, sampling, and surveying to research rising gas prices and the affects on consumers. After gathering the necessary data, this paper examines the measures of central tendency and dispersion for the gas prices in the sample areas. The research included three weeks of gas prices with gas types ranging from unleaded to diesel. The sample gas pricing surveys were from areas along the west coast in Arizona and 2
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Descriptive Statistics California. Three measures of central tendency are mean, median, and mode. The mean is the datasets’ average value. Median refers to the middle value. Mode refers to the greatest frequency of observations. Mean values for regular unleaded ranged from $2.92 to $3.01 per gallon, median values ranged from $2.93 to $3.03 per gallon, and mode values ranged from $2.92 to $3.02. A statistical dispersion or variability of a dataset measures observations distributed across various categories. The most popular measures of dispersion are range, variance, and standard deviation. Range values were between 0.36, for the first two weeks, and 0.45 for the third week. The
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WK 4- Team A Descriptive Statistics Paper - Descriptive...

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