Learning Objectives
After reading this chapter, you should understand:
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The workflow involved in a market research study.
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Univariate and bivariate descriptive graphs and statistics.
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How to deal with missing values.
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How to transform data (z-transformation, log transformation, creating dummies, aggregating variables).
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How to identify and deal with outliers.
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What a codebook is.
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The basics of using IBM SPSS Statistics.
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Notes
- 1.
- 2.
A similar type of chart is the line chart. In a line chart, measurement points are ordered (typically by their x-axis value) and joined with straight line segments.
- 3.
Note that the terms n-1 in the numerator and denominator cancel each other and are therefore not displayed here.
- 4.
The logarithm is calculated as follows: If x = y b, then y = log b (x) where x is the original variable, b the logarithm’s base, and y the exponent. For example, log 10 of 100 is 2. Logarithms cannot be calculated for negative values (such as household debt) and for the value of zero.
- 5.
In the dataset TV_market.sav, the variable quality_3D_rating has −99 defined as missing value, indicating that the rating is not applicable as the corresponding TV does not have 3D functionality.
- 6.
Note that all following analyses will be based on the reduced dataset TV_market_reduced.sav.
- 7.
As we had already introduced box plots in the sections on univariate outlier detection, we do not repeat the discussion here.
- 8.
You can also ask for the covariances to be shown by selecting Cross-product deviations and covariances under Options.
References
Agarwal, C. C. (2013). Outlier analysis. New York, NY: Springer.
Cohen, J. (1988). Statistical power analysis for the behavioral sciences (2nd ed.). Hillsdale, NJ: Lawrence Erlbaum Associates.
Collier, J. (2010). Using SPSS syntax: A beginner’s guide. Thousand Oaks, CA: Sage.
Gladwell, M. (2008). Outliers: the story of success. New York, NY: Little, Brown, and Company.
Hair, J. F., Jr., Black, W. C., Babin, B. J., & Anderson, R. E. (2010). Multivariate data analysis. A global perspective (7th ed.). Upper Saddle River, NJ: Pearson.
Harzing, A. W. (2005). Response styles in cross-national survey research: A 26-country study. International Journal of Cross Cultural Management, 6(2), 243–266.
Johnson, T., Kulesa, P., Lic, I., Cho, Y. I., & Shavitt, S. (2005). The relation between culture and response styles. Evidence from 19 countries. Journal of Cross-Cultural Psychology, 36(2), 264–277.
Little, R. J. A. (1998). A test of missing completely at random for multivariate data with missing values. Journal of the American Statistical Association, 83(404), 1198–1202.
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Sarstedt, M., Mooi, E. (2014). Descriptive Statistics. In: A Concise Guide to Market Research. Springer Texts in Business and Economics. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-53965-7_5
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