Statgraphics

Kommentare: Extremely pleased and satisfied. Our office was, and remains, an innovator by applying statistical analyses (especially regression) to mass appraisal for real property tax assessments. It has also proved invaluable for fee appraisals by determining whether functional utility variables, e.g., car parking, number of baths, building square footage, walk-out basement, etc. provide value in a neighborhood and, if they do, by what dollar amount. That quantitative basis is a very powerful asset especially for valuation assignments where expert witness testimony in litigation is involved.

Vorteile: Its StatAdvisor which translates high-level statistical analysis into plain English readers and users can digest and use. This was the program's main attraction and selling point over the competition because it would be used by Deputy Assessors who had no background whatsoever in statistics. My Deputies went from complete neophytes to skilled users during our first general assessment. Now, four years later, they are digging-in much deeper given their confidence gained by not being made to feel ignorant or inadequate as they learned how to properly apply Statgraphics' broad range of statistical techniques we use.

Nachteile: Somewhat clumsy performance when all five of us are hitting it hard. At some times, the program seems to get narcoleptic or confused presenting incorrect output. Deleting and recreating that process fixes the problem.

Vorteile: It is easy to apply and the results include all the information necessary for a non-statistician to present results that reflect the strengths and limitations of the answers.

Nachteile: Sometimes it is hard to customize the output for inclusion in reports.

Kommentare: I have tried to use it many times with large Excel data files of around 1 GB but it has always been a failure and unable to manage this amount of data (big data !!).
In particular, the "big data" option that would be very useful never worked despite numerous attempts and requests for support, which after a while stopped "supporting"
In practice a good "didactic" product but not suitable for "heavy industrial" use.
Quite disappointed even though I occasionally continue to use it

Vorteile: Great ease of use
Quite complete
Sufficient documentation

Nachteile: Many options do not work or work badly
Tipically big data

Vorteile: simple usage, many procedures, compatibility with other programs

Nachteile: full of bugs - time consuming to figure out how to overcome this.

Kommentare: In research fields, all the experimental results and simulations have to be statistical validated. For a user with no background in data analysis, it is difficult to calculate condifence bounds, carry out hypothesis tests and multivariate analysis. Statgraphics has been very useful to understand the results obtained and validate the approaches we propose by means of statistical methods.

Vorteile: This software integrates a large amount of tools for data analysis. It permits to carry out univariate and multivariate analysis easily. Also, the StatAdvisor allows the user not only to get the mathematical results, but to analyze them with statistic fundamentals.

Nachteile: Despite the StatFolio is comparable to Excel Sheets or Google Sheets, the data has to be ready for statistical analysis. In the case of atypical values, or just the user trying to make operations between columns, this software only permits the user to delete or replace values.