# 8230 Unit VI Assessment Final

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8230 Unit VI Assessment Final
Unit VI Assessment Doctorate
Of
Business Administration Degree
Dhana K. Jones
Columbia Southern University

DBA 8230-11C
Dr. Castle
January 15, 2015

Unit IV Assessment
Question 1 Descriptive statistics refers to examining data to determine average, mode, median, kurtosis, skewness, and correlation. Statistical average is referred to as the mean. Researchers determine the mean by dividing the sum of observed values by the number of observations (n). Field (1998) states, statistical average (mean) boils down to the equation outcome = (model) + error (pg. 39). The mean is a good estimate for predictive statistical research. Standard deviation is a measure of the data spread and it is signified by the Greek letter sigma (σ). The standard deviation requires calculation of the average, compare each respondent’s value to the average, and square that difference (Burns & Bush, 2012, pg. 252). Therefore, the formula for standard deviation is the square root of the variance. The variance is the average of the squared differences of the mean. The standard deviation explains the density of data scattered around the mean. Curve distribution is a bell shaped curve when data is tightly bunched together. Highly arched bell shaped curves have a small standard deviation. Flat bell shaped curves have a large standard deviation.

A normal distribution of data indicates a section of data that are close to the average. The average is located at the curves center or midway point. The standard deviation is located on either side of the midway point. Normally distributed data is shaped as a bell curve. The proportion of data under the curve and within + or – 2.96 standard deviation describe the range that 99% of data is found (Burns & Bush, 2012, pg. 253).

Statistics

Purchase Price
Closing Date
Days on Market Before Sold
Home Size in Sq Ft
N
Valid
94
94
93
94

Missing
0
0
1
0
Mean
\$256,159.57
03/17/2000
49.53
2540.96
Median
\$281,000.00
03/20/2000
53.03
2687.50
Mode

References: Burns, A. C., & Bush, R. F. (2012). Basic Marketing Research. (S. Yagan, Ed.) Upper Saddle River, NY, US: Pearson Education Inc.,. Leedy, P. D., & Ormrod, J. E. (2010). Practical Research. (J. Johnson, Ed.) Upper Saddle River, NY: Pearson. Leedy, P. D., & Ormrod, J. E. (2010). Practical Research. (J. Johnson, Ed.) Upper Saddle River, NY: Pearson. Burns, A. C., & Bush, R. F. (2012). Basic Marketing Research. (S. Yagan, Ed.) Upper Saddle River, NY, US: Pearson Education Inc.,.