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T test is a statistical test used to determine if there is a significant difference between the means of two groups.
T test is used to compare the means of two groups to see if they are significantly different.
It is commonly used in hypothesis testing to determine if there is a significant difference between two sample means.
There are different types of t tests such as independent samples t test, paired samples t test, ...
Central Limit Theorem states that the sampling distribution of the sample mean approaches a normal distribution as the sample size increases.
Central Limit Theorem is a fundamental concept in statistics that states that the distribution of sample means approximates a normal distribution, regardless of the shape of the original population distribution.
It is important in inferential statistics as it allows us to make infe...
AUC ROC curve is a graphical representation of the performance of a classification model.
AUC stands for Area Under the Curve and ROC stands for Receiver Operating Characteristic.
It is used to evaluate the performance of binary classification models.
The curve plots the true positive rate against the false positive rate at various threshold settings.
A perfect model would have an AUC ROC score of 1, while a random model w
Gini index is a measure of inequality in a set of values, often used in decision tree algorithms.
Gini index ranges from 0 (perfect equality) to 1 (maximum inequality).
It is commonly used in decision trees to determine the impurity of a node.
A lower Gini index indicates a more homogeneous set of values.
Formula: Gini Index = 1 - (sum of squared probabilities of each class in the node).
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posted on 8 Jan 2025
I applied via Company Website and was interviewed in Jul 2024. There were 2 interview rounds.
One case study, had to build a system design around it
Live coding pandas, codesignal
I was interviewed before Jun 2016.
I applied via Campus Placement
I am passionate about analyzing data and deriving insights to drive strategic decision-making.
I have a strong background in data analysis and statistics.
I enjoy problem-solving and finding patterns in data.
I believe that my analytical skills can add value to the organization by providing actionable insights.
I have experience using various analytical tools such as Excel, SQL, and Tableau.
I am detail-oriented and thrive
Passion for analyzing data and making informed financial decisions.
I have always been fascinated by numbers and analyzing trends.
I enjoy the challenge of making sense of complex financial data.
I believe finance plays a crucial role in driving business success and growth.
I am motivated by the opportunity to help companies make informed financial decisions.
I find satisfaction in using data to identify opportunities for i
I applied via Campus Placement and was interviewed in Dec 2016. There were 5 interview rounds.
Guesstimate the number of credit cards in India.
Estimate the population of India
Determine the percentage of people who have credit cards
Consider the average number of credit cards per person
Factor in the growth rate of credit card usage
Consider the number of credit card issuers in India
I was interviewed in Jan 2017.
I want to join Citi because of its global presence, strong reputation, and opportunities for growth.
Citi is a global company with a presence in over 100 countries, which provides an opportunity to work with diverse teams and gain international exposure.
Citi has a strong reputation in the financial industry, known for its expertise and innovative solutions.
Citi offers excellent career development opportunities, includin...
I am interested in a career in banking because of the opportunities for growth, the dynamic nature of the industry, and my passion for financial analysis.
Opportunities for growth: Banking offers a wide range of career paths and opportunities for advancement. I am excited about the potential to develop my skills and progress within the industry.
Dynamic nature of the industry: Banking is constantly evolving, with new tec...
The Indian economy has experienced mixed performance in the past 2 years.
GDP growth rate has fluctuated
Demonetization and GST implementation impacted the economy
Unemployment rate has been a concern
Inflation has remained relatively low
Foreign direct investment has increased
Agricultural sector faced challenges due to weather conditions
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