Leveraging Z-Score to Understand Data Dispersion In my Standard Deviation article I demonstrated how to use the squared variance to show the average distance each data point resides from the mean. While variance and standard deviation illustrate data dispersion from the mean in terms of their precise location in relation to the mean, Z-Score provides…
Using Variance to Determine Dispersion In my distributions articles (stats link) I illustrated distributions and how their shapes may be understood in terms of data points and their relation to the mean. Since the mean represents the average of all values, understanding the spread of all data points, or the average distance data points from…
Leveraging Standard Deviation to Understand Data Dispersion In my Variance article I illustrated how to use variance to understand the average of all variances squared from the mean. In this article I will demonstrate how to determine standard deviation, which is simply the variance, squared. Excel provides the STDEV.P() function to use the data set…
Isolating Patterns Based on Conditions In my Marginal Distributions article, I illustrated how to leverage a data set to isolate two marginal distributions in comparison with the grand total of all distributions, to arrive at specific distributions. This concept illustrates the concept of a conditional distribution in that a distribution is isolated based on a…
Isolating a Distribution’s Subset In my Joint Distributions article, I illustrated how to provide a data set using two (joint) distributions, with the Age Groups and Years distributions complementing each other. In this article I will demonstrate how to create a marginal distribution, which isolates one of the available distributions and measures it against the…
Delivering Multidimensional Understanding In this article I will demonstrate how to use a data set to communicate joint (or two) distributions of data. First, I will convert the table into a relative cumulative table, beginning with the first age group (0-8). In this formula, I’m instructing Excel to divide the first diagnosis number (56) to…
Histogram: Quickly Illustrate Relative Frequency In my Relative Frequency Histogram article I demonstrated how to transform a histogram to show each category’s value in comparison to the grand total of all diagnosis. In this article, I will show how to begin with a relative frequency histogram and replace the bars with a simple line, showing…
