StaTool - Statistic and Probability tools for Windows

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Explanatory note

This page has exclusively informative and no legal character, reason why it will not be possible to be used as it bases for any kind of trial.

The offered contents are subject to changes without previous notice.

7 types of Statistic and Probability calculations

- Hypothesis testing.

- Confidence interval estimation.

- Probability distributions.

- One variable statistic.

- Two variables statistic.

- Total Probability Law and Bayes' Theorem.

- Probability of A and B events.

- Graphics: scatter plot, regression curve, bar and histogram charts.

Easy and fast to use.

User's manual in PDF format.

Hypothesis testing

StaTool has 9 types of Hypothesis testing:

One population:

1) Mean of population (known population variance).

2) Mean of population (unknown population variance).

3) Variance of population.

4) Ratio of population.

Two populations:

5) Mean difference of two populations (known population variances).

6) Mean difference of two populations (unknown and equal population variances).

7) Mean difference of two populations (unknown and different population variances).

8) Variance ratio of two populations.

9) Ratio difference of two populations.

Confidence interval estimation

StaTool has 9 types of Confidence Intervals:

One population:

1) Mean of population (known population variance).

2) Mean of population (unknown population variance).

3) Variance of population.

4) Ratio of population.

Two populations:

5) Mean difference of two populations (known population variances).

6) Mean difference of two populations (unknown and equal population variances).

7) Mean difference of two populations (unknown and different population variances).

8) Variance ratio of two populations.

9) Ratio difference of two populations.

Probability distributions

StaTool has 6 types of probability distribution:

1) Normal.

2) t-Student.

3) Chi-Square.

4) F-Snedecor.

5) Binomial.

6) Poisson.

One variable statistic

Allows us to calculate statistical data for one numeric variable X.

Data can be ungrouped or grouped (intervals or classes).

StaTool calculates the following statistical data:

1) Mean.

2) Median.

3) Mode.

4) Standard deviation.

5) Variance.

6) Coefficient of variation.

7) Skewness.

8) Kurtosis.

9) Moments (0th to 4th, about mean and origin).

10) Quartiles, deciles and percentiles and his inverses.

11) Graphic (bar and histogram chart) and printing.

- We can save and open data as a file (E1V extension).

- Also, we can print data and results.

Two variables statistic

Allows us to calculate statistical data for two numeric variables X and Y.

We can calculate 5 types of functions for regression analysis using the least squared method:

1) Linear

2) Logarithmic

3) Exponential

4) Power

5) Quadratic

StaTool calculates the following statistical data:

1) Means of X and Y.

2) Standard deviations of X and Y.

3) Variances of X and Y.

4) Covariance.

5) Coefficient of correlation.

6) Formula of regression curve.

7) Estimation of X or Y.

8) Graphic (scatter plot and regression curve) and printing.

- We can save and open data as a file (E2V extension).

- Also, we can print data and results.

Total Probability Law and Bayes' Theorem

We have a set of incompatible Ai events as a finite partition of the probability space.

Also, we have the event B that is compatible with each Ai.

If we know the probabilities p(Ai) and p(B / Ai), then StaTool calculates p(B) and p( Ai / B)