## Important information for Samsung users ##

On some Samsung GALAXY models there may be no decimal minus or space key on the numeric keyboard. In that case please install Google Keyboard from the Play Store and try it as the default keyboard. This also solves similar problems in other calculation apps.

By using Stats Tester you can do statistics calculation and analysis by an easy operation.

You can put data into the Data-window by using a keyboard or by pasting data from this app (other statistics methods) or other apps (e.g. Text editors and Google Sheet).

Except for the frequency data the maximum number of samples that can be processed is 100/group. When entering a lot of data it is convenient to paste data from Google Sheets etc. Original data can be saved as files.

A [Calc] button performs calculation and displays results to Result-window. Data on Result-window can be shared by some other apps (e.g. Mailers Google Sheets etc).

Each statistics method has useful [Help] and [Example] buttons.

Entered data and results calculated by each method are memorized until the next use. This function is a feature of this app and it is very convenient.

This app can be used for basic statistics biostatistics and medical statistics. It can be also used to study statistical method by using textbooks.


## Acknowledgment: The AChartEngine library distributed under the Apache 2.0 license was utilized to make chart.
http://www.achartengine.org
http://www.apache.org/licenses/LICENSE-2.0.html


* Parametric statistics:

1. Mean SEM and SD etc
- Arithmetic Geometric and Harmonic means
- Confidence interval
- Sum
- Sum of Square
- Variance
- Skewness
- Kurtosis

2. SD-SEM Conversion
(Converter between Standard Deviation and Standard Error)

3. One-sample t-test

4. Paired t-test

5. t-test (Student and Welch)
- F-test to compare 2 variances
- Student's t-test
- Welch's procedure

6. F-test for equality of 2 variances
- Mean and SD
- F-test

7. Levene test for homogeneity of variance
(n >=3 groups)

8. One-way ANOVA

9. Multiple t-test (with Bonferroni's correction)

10. Correlation and Regression
- Correlation coefficient
- Regression coefficient
- Coefficient of determination
- Test for correlation coefficient


* Nonparametric statistics:

1. Median Range and Quartiles etc
- Minimum First second and third Quartiles Maximum Quartile deviation

2. Mann-Whitney's U test

3. Kruskal-Wallis test and multiple comparisons

4. Sign Test

5. Wilcoxon's signed-rank test
(paired 2 groups)

6. Chi-square test (Goodness of Fit)

7. Chi-square test(Independence 2x2)

8. Chi-square test(Independence mxn)

9. McNemar's test (paired case)

10.Fisher's exact test

11.Spearman rank correlation coefficient

--------------------------------
* Major update

Ver 2.1.0(2017.09.27)
+ Added "Chi-square test (m x n independency)".
Max size = 10 x 8

Ver 2.0.1
+ Added "Spearman rank correlation coefficient".
+ Added graphic function to "Levene test" "Mann-Whitney U test" "Kruskal-Wallis test" and "Chi-square test (Goodness of Fit)".

Ver 1.6.4
+ Added "Levene test for homogeneity of variance" and "Kruskal-Wallis test".

Ver 1.6.3
+ Added graphic function to "1 sample t-test" "Paired t-test" and "F-test".

Ver 1.6.2
+ Added graphic function to "Mean SEM" "1-way ANOVA" and "Multiple t-test".

Ver 1.6.1
+ Added graphic function to "t-test (Student and Welch)" and "Correlation and Regression".

Ver 1.5.2
+ Renamed to "Stats Tester" from "EasyStatCalc".
+ Added "Chi-square test (Goodness of Fit)".

Ver 1.3.1
+ Added "SD-SEM conversion".
+ Added "1-sample t-test".

Ver 1.2.0
+ Added "Multiple t-test(Bonferroni)".
+ Updated "1-way ANOVA".

Ver 1.1.2
+ Added "F-test".
+ Added "1-way ANOVA".
+ Added "Fisher's exact test".

Ver 1.1.1
+ Added "Sign test".
+ Added Skewness Kurtosis Geometric and Harmonic mean to "Mean SEM"

Ver 1.0.9
+ Added "McNemar test".

Ver 1.0（2016.07.15）