Question 1

What is the difference between mean and median?

Accepted Answer

The mean is the sum divided by the count. The median is the middle value when the numbers are sorted. The median is less affected by extreme values.

Question 2

How is the mode calculated?

Accepted Answer

The mode is the value that appears most often. If several values tie, all of them are shown. If no value repeats, there is no mode.

Question 3

Which standard deviation do you use?

Accepted Answer

The population standard deviation, which divides by the number of values. It is the common choice when your list is the whole dataset.

Question 4

Is my data uploaded?

Accepted Answer

No. Everything is computed locally in your browser and never leaves your device.

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