Data Science Interview Questions Part-7(Statistics)

Top-25 frequently asked data science interview questions and answers on Statistics for fresher and experienced Data Scientist, Data analyst, statistician, and machine learning engineer job role.

Let’s see the interview questions.

1. What is the difference between inferential statistics and descriptive statistics?

Descriptive statistics describe the input data and provide initial findings for data. It will give the mean, median, standard deviation, etc. For example, the manager of a supermarket wants to see the waiting time for billing.

Inferential statistics allow us to make inferences from a smaller sample of data from the population. It is used when we have limited time, cost, and other constraints. For example, the LED bulb manufacturing firm wants to check the average working hours of LED bulbs. In this case, the firm can’t test all the bulbs they need to take a small sample of bulbs and infer the results from the sample for all the bulbs.

2. What are the standard deviation and standard variance?

Standard deviation is the average distance from the mean or variation from the mean. A small value of standard deviation shows closeness in…