Expert Witness Testimony

We are happy to provide the help you need at any or all of the following steps in earning the data-based answers you request:

-designing the data collection process

-inputting, organizing, and cleaning the data

-implementing the statistical analyses

-interpreting results and mapping implications for strategy

-providing syntax and raw output file

-explaining the results

-allowing unlimited e-mail and phone support to ensure that you completely understand the results of the analysis

We are dedicated to detecting and correcting corrupt or inaccurate records from a record set, table, or database. The process of data cleaning includes data auditing, workflow specification, workflow execution, post-processing, and controlling. We can use popular methods. Those include parsing, data transformation, duplicate elimination, and statistical methods. By analyzing the data using the values of mean, standard deviation, range, and clustering algorithms, we can find values that are unexpected and thus erroneous.

We can examine any standardized residual greater than about 3 in absolute value, Hat element greater than 3p/n (p=k+1, k degrees of freedom), a Cook’s distance > 1, and Mahalanobis’s distance for case. We run Outlier Analysis such as a run-sequence plot,  a scatter plot, a histogram, and a box plot.

We can test reliability (such as Cronbach’s alpha, test-retest reliability, split-half reliability, and inter-rater reliability) and validity (such as content validity, construct validity, criterion validity, internal validity, and external validity).

We can design and perform the required statistical analyses. We are experts in statistical analysis such as t-test, ANOVA, traditional regression, logistic regression, MANCOVA, factor analysis, cluster analysis, survival analysis, time series analysis, canonical correlations, discriminant analysis, and more advanced statistical techniques such as structural equation modeling (SEM), hierarchical linear modeling (HLM), and path analysis. We are experts in statistical programming languages such as SAS, SPSS, HLM, Mplus, and Access.

We provide all of our prospective clients with a Non-Disclosure Agreement immediately upon contact. Statistical Consulting Group shall maintain in strict confidence, and not use or disclose except pursuant to written instructions from prospective clients, provided that the obligation to protect the confidentiality of any such information or data shall not be excused if such information or data ceases to qualify as a Trade Secret as a result of the acts or omissions of Statistical Consulting Group.