Probability Test

Q: What topics are covered in the Probability Test?

概率基础 组合学 随机变量 联合分布 定量才能 数值推理

About the test:

概率测试评估了候选人对概率概念的理解及其在定量分析中的应用。它以概率理论的重点评估了诸如定量才能，数值推理，逻辑推理和数据解释等主题的知识。

Covered skills:

概率基础
随机变量
定量才能

组合学
联合分布
数值推理

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9 reasons why

Adaface Probability Assessment Test is the most accurate way to shortlist 数据分析师s

Reason #1

Tests for on-the-job skills

The Probability Test helps recruiters and hiring managers identify qualified candidates from a pool of resumes, and helps in taking objective hiring decisions. It reduces the administrative overhead of interviewing too many candidates and saves time by filtering out unqualified candidates at the first step of the hiring process.

The test screens for the following skills that hiring managers look for in candidates:

理解基本概率概念
能够在概率问题中应用组合技术
随机变量及其属性的知识
了解联合概率分布
用于解决概率有关的问题的定量才能
在概率方案中数值推理的能力

Reason #2

No trick questions

Traditional assessment tools use trick questions and puzzles for the screening, which creates a lot of frustration among candidates about having to go through irrelevant screening assessments.

View sample questions

The main reason we started Adaface is that traditional pre-employment assessment platforms are not a fair way for companies to evaluate candidates. At Adaface, our mission is to help companies find great candidates by assessing on-the-job skills required for a role.

Why we started Adaface

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Reason #3

Non-googleable questions

We have a very high focus on the quality of questions that test for on-the-job skills. Every question is non-googleable and we have a very high bar for the level of subject matter experts we onboard to create these questions. We have crawlers to check if any of the questions are leaked online. If/ when a question gets leaked, we get an alert. We change the question for you & let you know.

How we design questions

这些只是我们库中有10,000多个问题的一个小样本。关于此的实际问题概率测试将是不可行的.

🧐 Question
Medium Green or red balls	Try practice test
A bag contains 5 red balls, 6 yellow balls and 3 green balls. If two balls are picked at random, what is the probability that both are red or both are green in colour?
Hard Square points and Circle	Try practice test
What is the probability that two uniformly random points in the square are such that center of the square lies in the circle formed by taking the points as diameter
Medium Increasing monthly gross profit Percentage Calculations	Try practice test
The CEO of Snipr. Inc wants to grow monthly gross profit by 4%. If costs stay the same, what does the sales turnover need to be in February to achieve this goal?
Hard Magic bag Arithmetic Sequences	Try practice test
Alex’s uncle is a magician who gave them a magic bag in which coins get doubled each time you put those coins into it. Initially, Alex had few coins with them. So, Alex put all the coins, and the coins got doubled. Alex took out all the coins and gave a few to their friend and then again put the remaining coins back in the bag. The coins doubled again; Alex took out all the coins again and gave a few coins to their second friend. Alex then put the remaining coins in the bag and the coins doubled again. Alex took out all the coins and gave a few coins to their third friend. There were no coins left with Alex when Alex gave coins to the third friend and Alex gave an equal number of coins to each friend. What is the minimum number of coins Alex had initially and how much did Alex give to each friend? A: Started with 3 coins B: Started with 5 coins C: Started with 6 coins D: Started with 7 coins E: Started with 9 coins F: Gave 3 coins in every turn G: Gave 4 coins in every turn H: Gave 5 coins in every turn I: Gave 7 coins in every turn J: Gave 8 coins in every turn K: Gave 9 coins in every turn
Medium Three Clocks Time Calculations	Try practice test
In my house, there are three clocks of different shapes – a round clock, a square clock, and a rhombus clock. The rhombus clock is always accurate whereas the round clock gains 2 minutes every day and the square clock loses 2 minutes every day. I checked the clocks on July 22nd, 2007 at 10 PM, and they were showing different times. Two hours later, when I checked, the clocks were showing the same time, then on which date will all three clocks show the same time again? A: 17 July 2008 B: 23 Sep 2007 C: 25 July 2009 D: 19 Aug 2008 E: 26 July 2008 F: 28 Nov 2007 G: 11 June 2008 H: 15 Aug 2007

	🧐 Question	🔧 Skill
	Medium Green or red balls	2 mins Probability	Try practice test
A bag contains 5 red balls, 6 yellow balls and 3 green balls. If two balls are picked at random, what is the probability that both are red or both are green in colour?
	Hard Square points and Circle	3 mins Probability	Try practice test
What is the probability that two uniformly random points in the square are such that center of the square lies in the circle formed by taking the points as diameter
	Medium Increasing monthly gross profit Percentage Calculations	2 mins Numerical Reasoning	Try practice test
The CEO of Snipr. Inc wants to grow monthly gross profit by 4%. If costs stay the same, what does the sales turnover need to be in February to achieve this goal?
	Hard Magic bag Arithmetic Sequences	3 mins Numerical Reasoning	Try practice test
Alex’s uncle is a magician who gave them a magic bag in which coins get doubled each time you put those coins into it. Initially, Alex had few coins with them. So, Alex put all the coins, and the coins got doubled. Alex took out all the coins and gave a few to their friend and then again put the remaining coins back in the bag. The coins doubled again; Alex took out all the coins again and gave a few coins to their second friend. Alex then put the remaining coins in the bag and the coins doubled again. Alex took out all the coins and gave a few coins to their third friend. There were no coins left with Alex when Alex gave coins to the third friend and Alex gave an equal number of coins to each friend. What is the minimum number of coins Alex had initially and how much did Alex give to each friend? A: Started with 3 coins B: Started with 5 coins C: Started with 6 coins D: Started with 7 coins E: Started with 9 coins F: Gave 3 coins in every turn G: Gave 4 coins in every turn H: Gave 5 coins in every turn I: Gave 7 coins in every turn J: Gave 8 coins in every turn K: Gave 9 coins in every turn
	Medium Three Clocks Time Calculations	3 mins Numerical Reasoning	Try practice test
In my house, there are three clocks of different shapes – a round clock, a square clock, and a rhombus clock. The rhombus clock is always accurate whereas the round clock gains 2 minutes every day and the square clock loses 2 minutes every day. I checked the clocks on July 22nd, 2007 at 10 PM, and they were showing different times. Two hours later, when I checked, the clocks were showing the same time, then on which date will all three clocks show the same time again? A: 17 July 2008 B: 23 Sep 2007 C: 25 July 2009 D: 19 Aug 2008 E: 26 July 2008 F: 28 Nov 2007 G: 11 June 2008 H: 15 Aug 2007

	🧐 Question	🔧 Skill	💪 Difficulty	⌛ Time
	Green or red balls	Probability	Medium	2 mins	Try practice test
A bag contains 5 red balls, 6 yellow balls and 3 green balls. If two balls are picked at random, what is the probability that both are red or both are green in colour?
	Square points and Circle	Probability	Hard	3 mins	Try practice test
What is the probability that two uniformly random points in the square are such that center of the square lies in the circle formed by taking the points as diameter
	Increasing monthly gross profit Percentage Calculations	Numerical Reasoning	Medium	2 mins	Try practice test
The CEO of Snipr. Inc wants to grow monthly gross profit by 4%. If costs stay the same, what does the sales turnover need to be in February to achieve this goal?
	Magic bag Arithmetic Sequences	Numerical Reasoning	Hard	3 mins	Try practice test
Alex’s uncle is a magician who gave them a magic bag in which coins get doubled each time you put those coins into it. Initially, Alex had few coins with them. So, Alex put all the coins, and the coins got doubled. Alex took out all the coins and gave a few to their friend and then again put the remaining coins back in the bag. The coins doubled again; Alex took out all the coins again and gave a few coins to their second friend. Alex then put the remaining coins in the bag and the coins doubled again. Alex took out all the coins and gave a few coins to their third friend. There were no coins left with Alex when Alex gave coins to the third friend and Alex gave an equal number of coins to each friend. What is the minimum number of coins Alex had initially and how much did Alex give to each friend? A: Started with 3 coins B: Started with 5 coins C: Started with 6 coins D: Started with 7 coins E: Started with 9 coins F: Gave 3 coins in every turn G: Gave 4 coins in every turn H: Gave 5 coins in every turn I: Gave 7 coins in every turn J: Gave 8 coins in every turn K: Gave 9 coins in every turn
	Three Clocks Time Calculations	Numerical Reasoning	Medium	3 mins	Try practice test
In my house, there are three clocks of different shapes – a round clock, a square clock, and a rhombus clock. The rhombus clock is always accurate whereas the round clock gains 2 minutes every day and the square clock loses 2 minutes every day. I checked the clocks on July 22nd, 2007 at 10 PM, and they were showing different times. Two hours later, when I checked, the clocks were showing the same time, then on which date will all three clocks show the same time again? A: 17 July 2008 B: 23 Sep 2007 C: 25 July 2009 D: 19 Aug 2008 E: 26 July 2008 F: 28 Nov 2007 G: 11 June 2008 H: 15 Aug 2007

Reason #4

1200+ customers in 75 countries

借助 Adaface，我们能够将初步筛选流程优化达 75% 以上，为招聘经理和我们的人才招聘团队节省了宝贵的时间！

Brandon Lee, 人事主管, Love, Bonito

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Reason #5

Designed for elimination, not selection

The most important thing while implementing the pre-employment 概率测试 in your hiring process is that it is an elimination tool, not a selection tool. In other words: you want to use the test to eliminate the candidates who do poorly on the test, not to select the candidates who come out at the top. While they are super valuable, pre-employment tests do not paint the entire picture of a candidate’s abilities, knowledge, and motivations. Multiple easy questions are more predictive of a candidate's ability than fewer hard questions. Harder questions are often "trick" based questions, which do not provide any meaningful signal about the candidate's skillset.

Science behind Adaface tests

Reason #6

1 click candidate invites

Email invites: You can send candidates an email invite to the 概率测试 from your dashboard by entering their email address.

Public link: You can create a public link for each test that you can share with candidates.

API or integrations: You can invite candidates directly from your ATS by using our pre-built integrations with popular ATS systems or building a custom integration with your in-house ATS.

Reason #7

Detailed scorecards & benchmarks

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Reason #8

High completion rate

Adaface tests are conversational, low-stress, and take just 25-40 mins to complete.

This is why Adaface has the highest test-completion rate (86%), which is more than 2x better than traditional assessments.

Reason #9

Advanced Proctoring

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About the Probability Online Test

Why you should use Pre-employment Probability Test?

The 概率测试 makes use of scenario-based questions to test for on-the-job skills as opposed to theoretical knowledge, ensuring that candidates who do well on this screening test have the relavant skills. The questions are designed to covered following on-the-job aspects:

了解概率基础知识
组合学的知识
与随机变量一起工作的能力
了解联合分布
定量能力技能
数值推理能力
概率基础的坚实掌握
精通组合分析
对随机变量的高级理解
联合概率分布的专业知识

Once the test is sent to a candidate, the candidate receives a link in email to take the test. For each candidate, you will receive a detailed report with skills breakdown and benchmarks to shortlist the top candidates from your pool.

What topics are covered in the Probability Test?

概率基础
概率基础的技能涉及了解与概率相关的基本原理和概念，包括使用概率规则计算事件的概率，以及了解不同类型的概率分布。该技能应在测试中衡量以评估候选人对概率的基本知识和理解，这在统计，数据分析和决策等各个领域至关重要。
Compinatorics </h4> <p >组合学是计数和安排对象或事件的技能。它包括诸如排列，组合和计数原理等概念。测量测试中的这一技能有助于评估候选人解决涉及安排，选择和计数对象的问题的能力，这在各种数学和统计应用中至关重要。</p> <h4>随机变量</p> </p> </p>
随机变量的技能涉及了解随机变量及其概率分布的概念。随机变量是变量，其值取决于随机事件的结果。测量测试中的这一技能可以评估候选人分析和解释随机现象的能力，并将概率分布应用于模型现实世界情况。
联合分布
联合分布请参阅到两个或多个随机变量的概率分布。该技能涉及了解关节概率分布，条件概率和相关概念。在测试中包括这种技能有助于评估候选人对建模和分析多个随机变量之间关系的理解，这在机器学习，财务和运营研究等各个领域至关重要。
Full list of covered topics
The actual topics of the questions in the final test will depend on your job description and requirements. However, here's a list of topics you can expect the questions for 概率测试 to be based on.
样本空间
事件
概率规则
有条件的概率
独立事件
排列和组合
阶段符号
概率分布
预期值
卑鄙，中位数和模式
差异和标准偏差
二项分布
泊松分布
正态分布
中心极限定理
关节概率
边际概率
有条件的概率
随机变量
概率密度函数
累积分布函数
随机变量的期望值
力矩生成功能
定量才能
数字系列
计算百分比
数据解释
定量比较
数值推理
估计
概率难题
统计分析

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What roles can I use the Probability Test for?

数据分析师
数据科学家
业务分析师
金融分析师
风险分析师
统计员
市场研究分析师
精算师
运营研究分析师
质量控制分析师

How is the Probability Test customized for senior candidates?

For intermediate/ experienced candidates, we customize the assessment questions to include advanced topics and increase the difficulty level of the questions. This might include adding questions on topics like