PHP class to calculate data for control charts

We would like to get created a PHP class for the statistical management of an array of data to generate XmR control charts. We don't need any graphical work. Just the statistical calcualtions.

Detailed information on how to do these kind of statistical calculations is available at [url removed, login to view]:_Basic_control_charts:_theory_and_construction,_sample_size,_x-bar,_r_charts,_s_charts. A simplified example in excel file is also attached. Take into account that some calculations in the excel file have been simplified.

1. Basic calculations based on the input array that the PHP class has to provide:

- Central line

- σ, 2σ and 3σ of the central line

- Moving ranges

- Average moving range

- Upper range limit

- Lower natural process limit

- Upper natural process limit

- Target lower limit

- Target central line

- Target upper limit

2. Interpret signals in the data

- Detect outliers: A point outside the natural process limits indicates something unusual happened.

- Detect Long runs: 8 consecutive points running on one side of the central line (or 10 in 12, or 12 in 14)

- Detect Short runs: At least 3 out of 4 consecutive points closer to the control limit than to the central line.

In general, these four rules have to be checked:

- Any point falls beyond 3σ from the central line (this is represented by the upper and lower control limts).

- Two out of three consecutive points fall beyond 2σ on the same side of the central line.

- Four out of five consecutive points fall beyond 1σ on the same side of the central line.

- Nine or more consecutive points fall on the same side of the central line.

3. Recalculation of central line and limit

If there is a long run or a short run that continues up to 5 values, the central line and the natural process limits have to be recalculated.

Skills: Mathematics, PHP, Statistics

( 244 reviews ) Santiago de Compostela, Spain

Project ID: #9032531

Awarded to:

stefanache

Hello, The solution will be based on -CSS,HTML, -PhP The development will can track in real-time on my developer site at [login to view URL] Thanks.

\$111 USD in 3 days
(19 Reviews)
5.0

10 freelancers are bidding on average \$234 for this job

KESHAVINFOTECH

Hi Thanks for your valuable time. :-) Just reply with 'Yes' and We will come up with a. Detail project plan with our comments/queries. b. Best-feasible-real COST & TIMELINE We will provide you a. Best More

\$250 USD in 15 days
(548 Reviews)
8.3
graphicaa

Greetings, This is GOPAL for STALLIONi, 1. The php class to handle the xmr chart values can be developed. 2. The points mentioned in the requirement such as a. Basic calculations based on the Input array. More

\$526 USD in 12 days
(333 Reviews)
8.1
mituld

Hi I work towards providing reliable, relevant and robust IT solutions at most competitive prices to my customers. I ensure 100% customer satisfaction so lets start Thanks

\$216 USD in 10 days
(262 Reviews)
7.8
gopalvora

Hi I have gone through the details of your project and we find it well within our capabilities. I offer a wide range of services, including Web design, PHP/MySQL web application development, Open sources like Joo More

\$201 USD in 7 days
(378 Reviews)
7.9
scriptphp87

Hello, I'm a professional programmer for web programming with php language to build the system website, Besides, I'm also expert in MySQL , HTML,HTML5,CSS, JS I'm always top in Vietnam freelancer [login to view URL] More

\$263 USD in 7 days
(192 Reviews)
7.7
techwelfare

Dear Sir we are capable of performing the required task perfectly with accuracy, please let us know if you want to clarify in details.. if you want us to share our skill and previous work please initiate the chat b More

\$174 USD in 5 days
(94 Reviews)
6.4
CoderBoyNasim

Dear Hiring Manager Take my respect. As a Senior Web Programmer i would like to request you highly to give me this project.I have 6 years experience in the following areas: HTML5 CSS3 PHP Mysql Ajax eCommerce JAVA SC More

\$222 USD in 3 days
(29 Reviews)
4.3
TechTraf

A proposal has not yet been provided

\$315 USD in 15 days
(4 Reviews)
3.2
AwaisChaudhry

A proposal has not yet been provided

\$206 USD in 3 days
(2 Reviews)
3.1
vikramstpl

You are looking for a Web developer for statistical calcualations as you mentioned in job description And I am here, as a Web expert, ready to make all customizations/updates and make your website up and running and More

\$231 USD in 3 days
(0 Reviews)
0.0
shubhayan

A proposal has not yet been provided

\$111 USD in 3 days
(0 Reviews)
0.0