# Tableau expert to build dashboard and psychometric calculations

Deliverable: Working Tableau workbook around data types and desirable contents

Freelancer sought: Expert Tableau builder with understanding of statistics (will need some statistics calculations in report)

Specific needs:

1) to create a type of "psychometric" view in Tableau. Sample data can be provided. Basically, each individual in the data needs to A) have a total score calculated, B) be categorized into a "performance group" like upper 20% or lower 20% based upon their score compared to all other individuals. Then each group's performance on various questions is displayed visually as in the image below. Each line would represent an answer choice. This is basically what is called a "distractor analysis" like here (see also Figure 1): [login to view URL] . Ideally this would be displayed with filters as shown in Figure 2, with the ability to compare two different data points.

2) I have need to convert specific answers into a "generic" type that can be exported if needed. For example, if the correct one is "quadratic formula", I need this recoded as "A" or "1" (A or 1 would always be the right answer. If there are two remaining incorrect ones (distractors), then I need it to assign a "B/2" and "C/3" to those choices. I have tried to do this, but I need someone to check this logic and see if there is an easier way to code this inside Tableau.

3) I have need to find three calculations inside Tableau that can be filtered as needed based on individual characteristics (e.g., region, exam language, etc). The first is the "difficulty", which is simply the % of people that get it correct. The last two of these values give an idea of the psychometric idea of "discrimination." The first is a point-biserial correlation, which is just like a correlation coefficient between a score (which would be a SUM of the correct indicators for each individual) and a specific item outcome (1/0 where 1 = right and 0 = wrong). This formula is shown in Figure 3. The last formula is just a subtraction of percentile ranks ... 73rd percentile minus 27th percentile (see Figure 4). Each of these numbers are statistics on the individual ITEMS.

4) Finally, I need to create overall summaries for the entire collection of items. This would include the average difficulty (% correct), an average for each of the 2 discriminations listed in #3, and something called a KR-20 metric. This KR-20 calculation in Excel is shown here: [login to view URL] . I need this to be in a type of "report card" as shown in Figure 5. All of these are aggregates of the total.

Näytä lisää: statistics, statistical analysis, data science

Tietoa työnantajasta:
( 0 arvostelua ) United States

Projektin tunnus: #18163176

## 23 freelanceria on tarjonnut keskimäärin %project_bid_stats_avg_sub_18% %project_currencyDetails_sign_sub_19%/tunti tähän työhön

schoudhary1553

Hello, Hope you are doing well. I can help with you in your project Tableau expert to build dashboard and psychometric calculations. I can assure you the quality job. I have good experience in Data Processing, Lisää

\$40 USD / tunti
(170 arvostelua)
7.3
suyashdhoot

Hi I am a very experienced statistician, data scientist and academic writer. I have completed several PhD level thesis projects involving advanced statistical analysis of data. I have worked with data from several comp Lisää

\$50 USD / tunti
(108 arvostelua)
6.8
zekovicm

Hi there, As an Power BI expert with extensive knowledge in statistics i can help you with this project. Please feel free to contact me to discuss further details. Best regards, Miljan

\$41 USD / tunti
(70 arvostelua)
6.6
shivampanchal

I have a good hands on working with Advanced R and Python and BI tools and technologies, AI, Big Data. I have quite a good knowledge of DL/ML Algorithm , have also developed Dashboards and Web Applications using flask/ Lisää

\$25 USD / tunti
(58 arvostelua)
6.4
aki003iitr

I am a data scientist with more than 4 years of experience in creating bisualisation using Tableau. I have worked on creating story mode and reporting dashboards with complex visualization in Tableau for various busin Lisää

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(24 arvostelua)
5.7
tolgahantarkan

Hi Sir, I am an industrial engineer holding masters degree from Swedish Jönköping University. I am specialized in data analysis and discrete event simulation having more than 5 years experience in this field both as a Lisää

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(6 arvostelua)
4.9
aimefx

Hi, I am expert in Excel, VBA, MySQL and Power BI. I can do any type of data analysis and data visualization creating pivot tables, charts, power pivot, interactive Real Time dynamic dashboards and Reports. I have Lisää

\$41 USD / tunti
(30 arvostelua)
4.7
seoguru17

Hope you are doing well. I have gone through your job description, I can help you in building dashboards on Datavisualization Tools Like (Klipfolio, Google Data Studio, Tableau, Supermetrics, PowerBI, plotly etc). I Lisää

\$27 USD / tunti
(13 arvostelua)
4.0
NeetuSinghal

Hi, I have 9 yrs of experience in data analytics with [login to view URL] in Operational Research. Data Analytics - I have done data modeling since last 9 years a and created more than 200 models. Experience in analytical Lisää

\$41 USD / tunti
(9 arvostelua)
3.8
nitinpateluk

Expert Tableau builder with understanding of statistics (will need some statistics calculations in report) - We have a team of 15+ Tableau developers and manager with us. They all have minimum 5 years of experience. We Lisää

\$40 USD / tunti
(1 arvostelu)
3.2
Galata16

as an engineer in statistics and applied economics and more technician in computer development. I am able and ready to execute this work

\$25 USD / tunti
(3 arvostelua)
1.7
SMKTableau

Hi, Greetings for the day!!! I'm Top rated BI analyst (Tableau) with 6+ years experience dealing with large data from banking, e-Commerce, Shipping Management and Online Trading firm’s. I'm good at designing dash Lisää

\$38 USD / tunti
(1 arvostelu)
1.7
jssymm

We work with various BI tools including Tableau, Jedox, PowerBI. We have the analysis skills to understand and implement statistical analysis. We are also familiar with psychometric testing - one of our clients is the Lisää

\$55 USD / tunti
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0.0
Dcevipul

I have a working experience of more than 10 years with MNC's including big 4. I worked as Business development consultant and strategic marketing consultant for leading MNC's and have exposure to business development Lisää

\$31 USD / tunti
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nvinciguerra

I've been getting insight from data and developing Tableau dashboards for important companies in Argentina. I'm looking to increase my client base abroad so I promise you I'll go for the extra mile in order to get refe Lisää

\$33 USD / tunti
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vijaydethaliya

I am quite good in tableau. I am pretty much comfortable to work your project. So i am ready to do your work.

\$27 USD / tunti
(0 arvostelua)
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JuliaPrylypko

Hi, I'm really passionated about Tableau. As analyst I can easily understand what users are really need. And based on this build report that will cover needs. I'm working with Tableau for 2 years already. So I ha Lisää

\$41 USD / tunti
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RMCRD

If you need the solution on a permanent basis (one or more users in the group) and not Tableua as a must then my cloud based solution could be the right one for you. 1) Powerful OLAP based BI platform accepting dat Lisää

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mailtoskarka93

I know tableau public, desktop 10.4. Relevant Skills and Experience Have create 3 dashboard in the time of my data analysis course.

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ideepeners

Hello Sir, Please have a go through at few of our samples : [login to view URL] We are Data Aalytics and Data Visualization Startup : IDeepeners. Team of experts Lisää

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0.0