Quick Bootstrap Statistics Взлом 6.1

Скриншоты

Описание

Bootstrapping is a technique for measuring sample statistics from a relatively small set of data elements. By randomly resampling with replacement from the array of data elements, the software is able to generate a distribution that approximates the Normal Distribution from which parametric statistics like mean, standard deviation, skewness, and kurtosis can be estimated.

In this application, there must be at least 6 data points (0 is a number) and resampling will create 10,000 or more sets, each of whose size will be user-defined in the iPad version or 2 in the iPhone version.

The iPad version allows for more resampling latitude and enhanced data entry. Another feature is the ability to add, retrieve, reorder, or delete data sets.

Results from the iPad version may be shared via email, text message, or print.

История обновлений

6.1

2021-12-23

- Fixed bug that may cause crashes when loading iPad version.
- Fixed issue with generation of PDF output.
- Minor GUI changes.
- Increased resampling limit to 50,000 sets in iPad version.

6.0

2021-06-27

- Changes necessitated by iOS 13 & 14
- Removed links to Facebook and Twitter
- Various GUI changes and enhancements
- Some code simplification

5.9

2018-05-21

This app has been updated by Apple to display the Apple Watch app icon.

- App now runs in all versions of iOS 11.
- Fixed an undocumented bug in iOS 11 that prevented numerical formatting of text fields. Don't ask. This makes no sense.

5.8

2018-02-28

- Code improvements for faster processing.
- iPad version now requires touching the "Resample Now..." button each time you wish to recalculate the statistics and create a graph.
- Due to apparent bug in iOS 11 on the iPad only, this app will crash on any iPad running iOS 11. However, the app runs as designed on iPhones running iOS 9.3 or newer including iOS 11, and iPads running iOS 9.3 or any version of iOS 10.

5.7

2016-11-30

- Code tweaks to accommodate iOS 10.

5.6

2015-10-01

- Changes to accommodate iOS 9, mostly font changes.
- In iPhone version, touching the slider initiates resampling whether the value is changed or not.

5.5

2015-07-17

- GUI changes.
- Bug fixes.

5.4

2015-05-20

- In iPhone version, replaced stepper button with two buttons that will increment or decrement the data entry figures continuously if pressed and held down or one number at a time if pressed and released immediately.
- In iPad version, arrow buttons increment or decrement their respective sliders with single touches.
- Sharing of report uses Apple's standard set of links to media such as SMS text messages and email.
- Modified Facebook sharing syntax.
- Various GUI modifications.
- Redesigned app icon.

5.3

2014-12-29

- Added links to social apps Facebook and Twitter
- The social apps and an account for each must exist for the link to be active
- Fixed bug in the display of histogram in iPad version
- Minor GUI tweaks

5.2

2014-12-20

- Updated for iOS 8 and iPhone 6.
- On iPad version, changed number of resamples range from 5,000 to 20,000 in increments of 1,000.
- Updated graphing engine.
- Changed minimum deployment target to iOS 7.1.

5.1

2014-05-03

- In the iPad version, the range of data points selected upon each resample is now between 1 and the number of total data points selected.
- A scroll wheel allows you to choose the number of data points in each resample.
- Reduced the number of resamples to between 1,000 and 10,000 in increments of 1,000 in order to speed up processing time in most instances.
- Audio feedback has been added for some GUI objects.

5.0

2014-02-28

- iPad version now adds email, text message, and print capability. A PDF report at a resolution of 72 dpi is available for sharing.
- Also, in iPad version there are now 10 more data points for data entry.
- Streamlined and improved source code.
- Because new data fields have been added, previously saved data sets will be replaced by the default data sets.

4.0

2013-12-17

- Rewritten and redesigned for iOS 7.
- Added warning to prevent inadvertent resetting of all data in both iPhone and iPad versions.
- GUI enhancements.

3.0

2013-08-18

- Major revision that includes the option of adding data sets, retrieving saved sets, and deleting or reordering the saved sets.

2.3

2013-03-28

- In iPad version, the behavior of the "info" and "clear" buttons have been modified to avoid unanticipated behaviors. Also, crashes resulting from touching the "info" button when it was already open or when the keyboard was displayed have been eliminated.

2.2

2013-03-04

- Fixed bug involving large arrays in iPad version of app.
- Users may have to delete and then reinstall the app to cure the problem.

2.1

2013-02-26

- Streamlined source code for better performance.

2.0

2013-02-06

- Quick Bootstrap Statistics is now a Universal app.

- Along with an increase in the range of numbers that can be input, the iPad version adds two user-defined options. One lets the user select the number of times samples will be taken with replacement between 2 and 5 times. Another allows varying the number of resamples in a computation between 10,000 and 250,000 times.

- Also, the iPad version displays a graph of the histogram derived from the frequency of resamples overlaid by the familiar bell-shaped curve of the Normal Distribution.

- Lastly, the iPad version adds two more percentile estimates: the 25th and the 75th percentiles.

1.3

2012-10-10

- Added button to move to previous data field.

- Increased the number of allowable data items from 15 to 20.

- Added a slider that defines the number of data items to include in the bootstrap computations. The range is 6 to 20.

- Removed the error message showing that 6 data items are needed since the slider sets the minimum. Also, removed the 'n/a' button as this too is unnecessary now.

- GUI changes.

1.2

2012-09-30

- Improved precision from single to double.

- Modified syntax of iTunes App Store link.

- GUI changes.

1.1

2011-12-01

- Added link on flip side view to MSYapps in iTunes App Store
- Enlarged the '+' and '-' toggle button slightly for better touch

1.0

2011-11-08