Question 1

What's the difference between mean, median, and mode?

Accepted Answer

Mean is the average of all numbers. Median is the middle value when numbers are sorted. Mode is the most frequently occurring number in the dataset.

Question 2

How do I enter my data?

Accepted Answer

Enter your numbers separated by commas, spaces, or line breaks. For example: 1, 2, 3, 4, 5 or 1 2 3 4 5.

Question 3

What is standard deviation?

Accepted Answer

Standard deviation measures how spread out the numbers are from the mean. A low standard deviation means numbers are close to the mean, while a high standard deviation means they're more spread out.

Question 4

When should I use population vs sample standard deviation?

Accepted Answer

Use population standard deviation when you have data for the entire population. Use sample standard deviation when you have a sample from a larger population.

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