Statistics Calculator++ 4+
Confidence Intervals & Test
Dogahe

 $4.99
iPhone Screenshots
Description
With Hypothesis Tests and Confidence Intervals. Box and Whisker Plot, Histogram, Scatter Plot, Line, Bar Graph, and Moving Average.
Statistics Calculator++ is a scientific calculator with statistical, regression analysis, probability distributions, confidence intervals, and hypothesis tests capabilities.
In designing the statistics functions of this app we had one thing in mind: The user should not need to read a single line of manual to perform the statistical analysis.
Simply use Add X, Add Y, and Add f buttons to enter the elements of the lists and frequencies, if any, and you are done. All the statistics and regression models are only a few taps and swipes away. Tap the List button to see the lists entered. The elements of the lists are interpreted independently (as two separate lists) and jointly for regression analysis (if the size of the lists are equal). You can also take advantage of a new import feature to bring in your data from Microsoft Excel or Apple Numbers by first converting them into .csv format.
The sum, mean, population standard deviation, sample standard deviation, sample variance, sum of squares, min, max, quartiles, and sum of multiplications of two lists are presented in a table. You can see the box and whiskers plot and histogram of the data.
For regression analysis linear, logarithmic, exponential, power, and quadratic regressions are calculated. Statistics Calculator++ has an extremely simple and intuitive user interface to choose the regression model and calculate predictions for x and y values and view residuals and residual sum of squares. It also graphs the regression model and how it fits around the data entered.
You have the capability to save multiple lists of data and use any of them as list X, list Y, or list f. Access Lists Editor feature by tapping the icon on top right of the Statistics Lists view. Furthermore, all these lists persist in the memory. Therefore, if you close and the relaunch the app the lists are there for you.
Normal distribution functionality of TI83/TI84 (normalpdf, normalcdf, invNorm, ShadeNorm), Student's tdistribution (tpdf, tcdf, invT), ChiSquared distribution, F distribution, Binomial distribution (binompdf, binomcdf), Poisson distribution (poissonpdf, poissoncdf), and Geometric distribution (geometpdf, geometcdf) are all possible with this app with an easy to use, and beautiful user interface. In addition you have Beta and Gamma Distributions.
Confidence interval calculation and step by step explanation for "One Population Proportion", "Difference in Two Population Proportions", "Population Mean", and "Difference in Population Means".
Hypothesis test for "Population Proportion", "Difference in Two Population Proportions", "Population Mean" and "Population Mean Difference" with known and unknown population standard deviations.
Other major features of Statistics Calculator++ are:
 The left pane scrolls to reveal more functionality without a need to switch modes.
 You see the expression as you enter and it keeps a history of your calculations
 Capability of performing fraction manipulations and converting between different formats (proper, improper, and mixed fractions) and seamless integration of fraction, integer, and decimal manipulations.
 Capability of inputting degrees, minutes, and seconds for angles and converting between degreesminutesseconds format and decimal format.
 Capability of calculating permutation, combination, Least Common Multiple (LCM), Greatest Common Divisor (GCD), and prime factorization.
 Quadratic and system of two linear equations solver
 Rectangular to polar and polar to rectangular coordinate conversion (extremely useful for phasor calculations for electrical engineers)
 Throws a set of dice (choice of 1 die to 4 dice)
 Backspace to delete last digit entered.
This is an ongoing project and we are working on more features and functions to be added to every update of the app.
You are going to love the simplicity of the user interface and yet have the powerful functionality with which Statistics Calculator++ is loaded.
What’s New
Version 1.66
Performance improvements.
Ratings and Reviews
I wish you could input Zscores into normal distribution
There is a few improvements but big one would be for you to swap input scores.
Developer Response ,
Could you please explain in more details what exactly you want as far as inputting zscores and also swapping scores? Feel free to send us an email explaining in more details and if possible some screenshots of which views in the app you would like the improvements and what problem you are you trying to solve. calc@dogahe.com
Statistics Normal Distribution
I was able to quickly and easily find the area under the standard normal distribution curve between my two values and so I can follow along with my online classes easily.
This is worth the small price of $2, especially if you are serious about learning statistics anyway.
Developer Response ,
Thanks a lot for the detailed description of the problem you were solving with Statistics Calculator++. We also appreciate the kind feedback and hope you did great in your online statistics course. 💯
Inapp purchases
I bought this app expecting full features that I could use WITHOUT having to pay a second time. I just wanted to see what my line of best fit would like like when graphed, but I have to pay for that! You guys already make us pay for an app that, at first, is quite confusing. Why should we pay for more?
Developer Response ,
Once you buy the app, ALL the features are available WITHOUT a need to purchase anything else. We simplified the purchase model and removed the need to purchase any inapp purchases.
App Privacy
The developer, Dogahe, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.
Data Not Collected
The developer does not collect any data from this app.
Privacy practices may vary, for example, based on the features you use or your age. Learn More
Information
 Seller
 Behzad Dogahe
 Size
 4.8 MB
 Category
 Utilities
 Compatibility

 iPhone
 Requires iOS 13.0 or later.
 iPod touch
 Requires iOS 13.0 or later.
 Languages

English
 Age Rating
 4+
 Copyright
 © Dogahe
 Price
 $4.99
Supports

Family Sharing
Up to six family members can use this app with Family Sharing enabled.