This test features MCQs on probability and statistics to help data professionals validate and strengthen analytical skills.

MCQs on Probability and Statistics for Data Science

Median adds all values and divides by count

Which statement is true regarding mean and median?

What does the Law of Large Numbers state?

How do you find the probability of two independent events both occurring?

Variance is the square root of standard deviation

Standard deviation is the square root of variance

How are variance and standard deviation related?

What does the null hypothesis typically represent?

In a skewed distribution, which statement is true?

It measures the spread of data from the mean

What does standard deviation indicate in a dataset?

Updating probabilities based on new evidence

What is Bayes’ Theorem primarily used for?

It guarantees all samples are normally distributed

It simplifies population data into normal distribution

It allows using normal distribution for inference on sample means

It ensures population mean is always known

Why is the Central Limit Theorem important in statistics?

Probability of observing data assuming null is true

What does a p-value represent in hypothesis testing?

Original data becomes normal after sampling

Sampling distribution of the mean approaches normality

Sample mean equals population mean always

What does the Central Limit Theorem state?

Range in which parameter lies with certain confidence

What does a confidence interval indicate?