Interview QuestionBank

In your view, what do you think might have caused the noticeable difference in performance between the control and variant groups in an A/B test?

Tell me about a time you had to use data to solve a problem and provide recommendations.

What's the chance of accurately guessing a card I draw from a deck? If I let you ask whether it's red or a face card to boost your odds, which query would you select?

In your view, what do you think might have caused the noticeable difference in performance between the control and variant groups in an A/B test?

If the margin of error is currently 3 with a sample size of n, how many samples do you need to collect to achieve a margin of error of 0.3?

Suppose you draw a value each day at random from a normal distribution with a mean of 0 and a standard deviation of How many days should it take on average for you to draw a value that's greater than 2?

Suppose you draw a value each day at random from a normal distribution with a mean of 0 and a standard deviation of How many days should it take on average for you to draw a value that's greater than 2?

What are the situations where you consider mean over median?

In your assessment of market size, which factors do you give significant weight to?

What steps would you take to produce 1000 normally distributed data points with mean=x and variance=y, and how would you visualize and summarize this data?

Explain your mindset regarding data-driven decision-making in your current position.

When do you prefer mean over median? Can you walk me through an example?

Could you break down the differences between the standard error of the mean and the standard error of the median?

How would you define whether a marketing channel is thriving or not?

How would you investigate if the number of transactions suddenly decreases?

Can you demonstrate how to quantify occurrences in a Markov chain's n-step run?

Please share the strategies you have applied to detect outliers in your data science endeavors.,

Could you explain a probability distribution that is not normal? Further, can you shed some light on a real-life scenario where this could be utilized?

Could you explain a probability distribution that is not normal? Further, can you shed some light on a real-life scenario where this could be utilized?

What is the maximum likelihood of getting k heads when you tossed coin n times? Explain the math behind it.