STATISTICA offers several nonparametric hypothesis tests that are very useful when assumptions of traditional statistical tests (such as t-tests and ANOVA) fail. These nonparametric tests do not make distributional assumptions such as normality of the data that other tests make. The one sample t-test from the Basic Statistics module tests the population mean against a hypothesized value. This test assumes a normal distribution of the data. If this assumption is not met, a nonparametric test can be used. The Nonparametric module does not offer a specific one-sample test. This example illustrates how the one-sample nonparametric test... Read More »
STATISTICA offers several nonparametric hypothesis tests that are very useful when assumptions of traditional statistical tests (such as t-tests and ANOVA) fail. These nonparametric tests do not make distributional assumptions such as normality of the data that other tests make.
The one sample t-test from the Basic Statistics module tests the population mean against a hypothesized value. This test assumes a normal distribution of the data. If this assumption is not met, a nonparametric test can be used. The Nonparametric module does not offer a specific one-sample test. This example illustrates how the one-sample nonparametric test...
Read More »
This example uses the example data set Aircraft.sta, which is distributed with STATISTICA. From the File menu, select Open Examples. Double-click the Datasets folder, and locate and open Aircraft.sta. The goal of this example is to perform a Box-Cox transformation of one dependent variable, VISC, and save the transformed values back to the original data set. Read More »
This example uses the example data set Aircraft.sta, which is distributed with STATISTICA. From the File menu, select Open Examples. Double-click the Datasets folder, and locate and open Aircraft.sta.
The goal of this example is to perform a Box-Cox transformation of one dependent variable, VISC, and save the transformed values back to the original data set.
In STATISTICA, date values of variables are stored internally as a single integer value that represents the number of days that have passed since January 1, 1900. The specific conversion of integer values to dates and vice versa is also affected by... Read More »
In STATISTICA, date values of variables are stored internally as a single integer value that represents the number of days that have passed since January 1, 1900. The specific conversion of integer values to dates and vice versa is also affected by...
Bundles can be used to organize large sets of variables and to facilitate the repeated selection of the same set of variables. By creating bundles, it’s possible to quickly and easily locate a subset of data in a large data file (e.g., if the same set of target variables are repeatedly used, you could create a bundle called Targets). When you are ready to perform an analysis using this data set, you can simply select the Targets bundle to include the entire set of target variables. Because bundles can include continuous and non-continuous selections (e.g., you can include variables 4, 9, and 32-35, and 119), you will save considerable time by selecting a bundle rather than looking for the correct variables to choose in a large data set. Read More »
Bundles can be used to organize large sets of variables and to facilitate the repeated selection of the same set of variables. By creating bundles, it’s possible to quickly and easily locate a subset of data in a large data file (e.g., if the same set of target variables are repeatedly used, you could create a bundle called Targets). When you are ready to perform an analysis using this data set, you can simply select the Targets bundle to include the entire set of target variables. Because bundles can include continuous and non-continuous selections (e.g., you can include variables 4, 9, and 32-35, and 119), you will save considerable time by selecting a bundle rather than looking for the correct variables to choose in a large data set.
STATISTICA provides many options to edit the appearance of your graphs. This example explains how to modify your point markers. Read More »
STATISTICA provides many options to edit the appearance of your graphs. This example explains how to modify your point markers.
STATISTICA contains several options for exporting graphs to other applications. Read More »
STATISTICA contains several options for exporting graphs to other applications.
STATISTICA can export data files to numerous Windows and non-Windows applications using the file export facilities. Read More »
STATISTICA can export data files to numerous Windows and non-Windows applications using the file export facilities.
There are times when the relationship between dependent and independent variables is not linear. In these cases it is useful to include polynomial terms to help explain the variance in our dependent variable. The polynomial terms are treated as main effects in our model, so an estimate and p-value will be calculated, and from these results we can determine if the curvature in the data that we see is statistically significant. If we use the Multiple Regression module, the only way to include squared terms (and any order or interaction terms) is to build them in separate variable columns in the data and then include them in the regression. However, if we... Read More »
There are times when the relationship between dependent and independent variables is not linear. In these cases it is useful to include polynomial terms to help explain the variance in our dependent variable. The polynomial terms are treated as main effects in our model, so an estimate and p-value will be calculated, and from these results we can determine if the curvature in the data that we see is statistically significant. If we use the Multiple Regression module, the only way to include squared terms (and any order or interaction terms) is to build them in separate variable columns in the data and then include them in the regression. However, if we...
I recently came across Hans Rosling's 2007 TED talk on poverty and statistics. (Video is embedded below.) The talk is entertaining and thought provoking. Dr Rosling founded a non-profit organization called GapMinder. Their goal is to be: “fact tank that promotes a fact based world view" Gapminder is a good source for free Read More »
I recently came across Hans Rosling's 2007 TED talk on poverty and statistics. (Video is embedded below.) The talk is entertaining and thought provoking.
Dr Rosling founded a non-profit organization called GapMinder. Their goal is to be:
“fact tank that promotes a fact based world view"
Gapminder is a good source for free
STATISTICA 6 was released it in 2001. It is not compatible with Windows Vista or Windows 7. You will need to upgrade to STATISTICA 10. StatSoft is offering an upgrade discount for past customers. And you may find the new features in STATISTICA 7, STATISTICA 8, STATISTICA 9 and STATISTICA10 to be useful for your tasks. Read More »
STATISTICA 6 was released it in 2001.
It is not compatible with Windows Vista or Windows 7. You will need to upgrade to STATISTICA 10.
StatSoft is offering an upgrade discount for past customers. And you may find the new features in STATISTICA 7, STATISTICA 8, STATISTICA 9 and STATISTICA10 to be useful for your tasks.