每日一练 | Data Scientist & Business Analyst 面试题 166

大数据应用 · 公众号 · 大数据 · 2017-08-20 09:00

正文

从6月15日起，数据应用学院将与你一起温习数据科学（DS）和商业分析（BA）领域常见的面试问题。希望积极寻求相关领域工作的你每天关注我们的问题并且与我们一起思考，我们将会在第二天给出答案。

Day 66

DS Interview Questions

Describe what is the Artificial Neural Network?

BA Interview Questions

What is Return on Investment (ROI) ? How to calculate ROI ?

欲知答案如何？请见下期分解！

Day 65 答案揭晓

DS Interview Questions

Tell me the process you will use to perform an A/B Testing.

Collect Data: Look for pages with low conversion rates or high drop-off rates that can be improved.
Identify Goals: Your conversion goals are the metrics that you are using to determine whether or not the variation is more successful than the original version.
Generate Hypothesis: Make the hypothesis for the plan you think it will improve the webpage
Create Variations: Make the desired changes to an element of your website or mobile app experience.
Run Experiment: Kick off your experiment and wait for visitors to participate! At this point, visitors to your site or app will be randomly assigned to either the control or variation of your experience. Their interaction with each experience is measured, counted, and compared to determine how each performs.
Analyze Results

BA Interview Questions

What is Marketing Mix Model (MMM)?

In simple terms, MMM is a tool that uses sales and marketing data to establish the return on investment (ROI) of each channel in the marketing mix helping organizations develop the most effective spending level for each channel. In other words, these models not only demonstrate the contribution of each communication program but are sophisticated enough to build future projections enabling budget optimization.

Reference: http://www.instituteforpr.org/top-five-questions-ask-mix-market-modeling/