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Winsorize To remove data that are not within an interval defined by two percentiles.Box-Cox transformation To improve the normality of the sample.It empowers you to find out the expectations of consumers towards new products and to model their choices thanks to conjoint analyses crucial steps of a marketing analysis.
LOG TRANSFORMATION XLSTAT SOFTWARE
Sign (-1/0/1) To convert all values that are negative to -1, all positive values to 1, and leave the 0s unchanged. XLSTAT-Conjoint Analysis module is a statistical software for marketers.XLSTAT accepts a fixed value of l, or it can find the value that maximizes the likelihood of the. Binarize (0/1) To convert all values that are not 0 to 1, and leave the 0s unchanged. Box-Cox transformation: to improve the normality of the sample.1/ Standard deviation (n) To divide the variables by their biased standard deviation.1/ Standard deviation (n-1) To divide the variables by their unbiased standard deviation.Standardize (n) To standardize the variables using the biased standard deviation.Cluster analysis was carried out using the Bray Curtis simi-larity. Standardize (n-1) To standardize the variables using the unbiased standard deviation. Before calculation, a logarithmic transformation log 10(x + 1) was applied to the data to de-crease the effects of a few but extremely abundant species.XLSTAT provides the following analytical functions: The larger x is, the slower log(x) increments. In other words, the log function compresses the range of large numbers and expands the range of small numbers. This function allows you to transform a quantitative variable using many different analytical functions. The function log 10 (x) maps the range of 1, 10 to 0, 1, 10, 100 to 1, 2, and so on. It can also be used simply to let your variable's distribution get closer to a normal distribution (notice that this does not work systematically).ĭeciding on the appropriate transformation will often improve the quality of your results. Variable transformation is often necessary to get a more representative variable for the purpose of the analysis. The Isthmus of Panama was a crossroads between North and South America during the continent’s first peopling (and subsequent movements) also playing a pivotal role during European colonization and the African slave trade.