# Research Design and Statistics Concepts Worksheet

## Research Design and Statistics Concepts Worksheet

• Submitted By: lestourgeon
• Date Submitted: 09/20/2008 11:49 AM
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• Page: 3
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Research Design and Statistics Concepts Worksheet
Concept Application of Concept in Scenario Reference to Concept in Reading
Tools of data analysis

The USA World Bank scenario used focus groups and surveys to determine the customerâ€™s opinion on recommended new products. The information was then gathered then presented in a fashion that gave meaning to the results collected. The tools used were graphs, charts and summary results. (Lind, Marchal, & Wathen, 2005, chap. 1)
(Lind, Marchal, & Wathen, 2005, chap. 2)
Different levels of measurement
The levels of measurement are nominal, ordinal, interval and ratio. Nominal indicates that data has no numerical value however it can be classified. An example is green shirts, red shirts, etc. An example of nominal is the counting of the object or subject being measured. Ordinal data is ranked, for example, 1, 2, 3, 4 or a, b, c, d or any other consecutive ranking identifier. Interval is the difference between two or more values. Ratio means that there is a meaningful 0 point and ratio between values. (Lind, Marchal, & Wathen, 2005, chap. 1)
Validity and reliability of data
The board member, Bea, suggests that the data used might not provide the correct population demographics to give a true picture of each groups desires. She questions the reliability based on the number of males versus females in the random sample used. (Cooper & Schindler, 2003, Chap 8)

Sampling Methods

Determining the sampling method is critical in observing the right information. When considering what to sample a researcher should pull a fair representation of the population. Completing research on an entire population could be costly and very time consuming. The USA World Bank scenario used random sampling to identify the desires of the customer base. However, as stated earlier Bea, the board member with statics background questioned the sampling methodology used. The survey provided ranked information, or ordinal...