About Stats Tester, Easy statistics
## Important information for Samsung users ## On some Samsung Galaxy models, there may be no space or comma key on the numeric keyboard. In that case, please install the Google Keyboard (Gboard)
## Important information for Samsung users ##
On some Samsung Galaxy models, there may be no space or comma key on the numeric keyboard. In that case, please install the Google Keyboard (Gboard) from the Play Store and try it as the default keyboard. This will allow you to use the Google numeric keyboard. This also solves similar problems in other calculation apps.
1. The max data number for each statistics is 100.
2. Each statistics method has useful [Help], [Example] and [Share] buttons.
3. Some tests have graph functions.
Detailed usage can be found in the "How to use" section below the list of statistics methods.
### Parametric statistics ###
1. Mean, SD, SEM, Skewness, Kurtosis
- Arithmetic, Geometric and Harmonic means
- Standard Error, Standard Deviation
- Confidence interval
- Sum
- Sum of Square
- Variance
- Skewness
- Kurtosis
2. Shapiro-Wilk test (Normality test)
- Shapiro-Wilk test
- Normal probability plot (graph)
3. SD-SEM Conversion
4. One-sample t-test (Comparison of mean)
5. Paired sample t-test
6. Two-sample t-test (Comparison of means)
- F-test to compare 2 variances
- t-test(Student and Welch)
7. F-test for equality of 2 variances
8. Levene test for homogeneity of variance
9. One-way ANOVA
10. Multiple t-test (with Bonferroni correction)
11. Pearson correlation coefficient (Linear regression)
- Correlation coefficient
- Regression coefficient
- Test for correlation coefficient
- Regression line (graph)
12. Test for difference between one-sample correlation coefficient and compared value
13. Test for difference between two-sample correlation coefficients
### Nonparametric statistics ###
1. Median, Range and Quartiles
- Quartile deviation
- Boxplot (graph)
2. Mann-Whitney U test (= Wilcoxon rank sum test)
3. Median test
(Mood's Median test)
4. Kruskal-Wallis test and multiple comparisons (Bonferroni correction)
5. Sign test (paired sample)
6. Wilcoxon signed-rank sum test (paired 2 groups)
7. Binomial test I [** Exact method ( 8. Binomial test II [** Approx method] (= One-sample proportion test)
9. Two-sample proportion test [** Approx method]
10. Chi-square test (Goodness of Fit)
11. Chi-square test(Independence, 2x2)
12. Fisher's exact test
13. Chi-square test(Independence, mxn)
14. McNemar test (paired case)
(Chi-square test of paired data. Exact Method)
15. Spearman rank correlation coefficient
### How to use ###
## Data entry ##
1. You can put data into the input-window by using a keyboard or by pasting data from this app or other apps.
2. Since one input-window accepts entering of many numbers, it is easy to edit entered data.
3. When entering a lot of data, it is convenient to paste data from Google Sheets, etc.
## Sharing data and results ##
1. [Input-window] has own copy/paste functions.
2. Input and Result data can be sent to mailers or saved to clouds (Google Drive, OneNote etc) by [Share] button.
3. Data on the output-window can be copied to your device by [Copy Results to ClipBoard] button.
## Saving graph ##
1. Please use the screenshot function of your device.
## Others ##
1. 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. [All Clear] button of option-menu(3 dot) on the first screen erases all saved data.)
2. This app can be used for basic statistics, biostatistics and medical statistics, etc. It can be also used to study statistical method by using textbooks or WEB pages.
### Acknowledgment###
The AChartEngine library distributed under the Apache 2.0 license was utilized to make chart.
https://github.com/ddanny/achartengine
http://www.apache.org/licenses/LICENSE-2.0.html
http://www.apache.org/licenses/LICENSE-2.0.html
Previous Versions
Here you can find the changelog of Stats Tester, Easy statistics since it was posted on our website on 2016-10-04 04:25:15.
The latest version is 4.0.1 and it was updated on 2024-04-22 21:31:27. See below the changes in each version.
Stats Tester, Easy statistics version 4.0.1
Updated At: 2020-05-22
Changes: Stats tester ver 4.0.1
Minor changes to previous major update version 4.0.
1) Binomial test(1 and 2): Removed extra line breaks in [Hint] display. Matched the input-data name with the result display.
2) One-sample t-test: In the help menu, "Population (Reference) mean" was changed to "Compared mean (c)".
Stats Tester, Easy statistics version 4.0
Updated At: 2020-05-02
Changes: For details, see What's New of this app.
I. Bug fix
1. [Two-sample t-test]
2. [Sign test]
II. New tests
1. [Binomial test 1 (Exact method)]
2. [Test between one-sample correlation coefficient and compared value]
3. [Test between two-sample correlation coefficients]
III. Updates
1. [Mann-Whitney U-test]
2. [One-sample proportion test] was renamed to[Binomial test 2 (approx. method)]
3. Ho and Ha were defined for all tests.
4. Made some other improvements.
Stats Tester, Easy statistics version 3.7.2
Updated At: 2020-03-16
Changes: 1. New: [Two-sample proportion test]
2. Updated: [Mann-Whitney U test]
3. [Correlation, Regression, .....]: Renamed to [Pearson correlation coefficient]. In addition, bugs that occurred with the following data were corrected. Example = [(1,1) (2,2) (3,3) (4,4)], etc. Fixed the same bug of [Spearman rank correlation].
4. [Spearman rank correlation coefficient]: Fixed the same bug as [Pearson correlation coefficient].
5. Fixed a bug by which some characters are underlined in red.
Stats Tester, Easy statistics version 3.6.2
Updated At: 2020-01-25
Changes: 1. New test: [One-sample proportion test] was added.
2. [t-test]: Calculation of Welch's p-value has been changed to direct from interpolation method.
3. [Mean and SD]: Kurtosis (α4: Normal distribution --> α4=3.0) was added.
4. A rare bug with [Share] button was fixed.
5. Updated help for some tests.
6. Notification became easier to read.
Stats Tester, Easy statistics version 3.5.6
Updated At: 2020-01-01
Changes: + Added [Shapiro-Wilk test (Normality)] and [Normal probability plot].
+ Added Kurtosis (a4) to [1. Mean, SEM and SD, etc]. (If a4 = 3 --> Normal distribution.)
+ Added explanations of Skewness and Kurtosis to HELP on [1. Mean, SEM and SD, etc].
+ Fixed crush bug in [Median test] when Number of data (n1+n2) is larger than 100.
+ Made minor improvements in wording in HELP for some tests.
Stats Tester, Easy statistics version 3.1.2
Updated At: 2018-10-17
Changes: The privacy policy was posted on the WEB site. Please tap [Privacy policy] on the 3-dot menu.
Stats Tester, Easy statistics version 2.3.2
Updated At: 2018-01-15
Changes: Ver 2.3.2(2018.01.15)
+ Added graphs to "Sign test" and "Wilcoxon signed-rank test".
+ Comma(",") can be used as delimiters for input data.
+ In locales such as Germany and France, the period(".") is used for a decimal separator for output data.
+ Some other modifications not affecting results.
Stats Tester, Easy statistics version 1.3.1
Updated At: 2017-01-03
Changes: Ver 1.3.1 (2017.01.03),+ "SD-SEM conversion" was added.,+ "One-sample t-test" was added.,+ "Fisher exact test": A bug in the very large frequency input was fixed.
Stats Tester, Easy statistics version 1.1.1
Updated At: 2016-09-29
Changes: Ver 1.1.1 (2016.09.29),+ Bug in "Test for Correlation" was fixed.,+ "Sign test" was added.,+ Followings were added to "Mean, SEM and SD".,- Skewness,- Kurtosis,- Geometric mean,- Harmonic mean
