What is the median of a data set?
AnswerThe middle value when sorted
Half the values are above the median and half below.
Science · Facts & stats
Stats facts & stats
7 fact-checked facts about statistics, data and probability, each with the reason behind it. 5 more are in today's round and join this page after it closes.
The basics
How is the range of a data set found?
AnswerMaximum minus minimum
Range shows the spread between the extremes.
Going deeper
What does standard deviation measure?
AnswerHow spread out values are from the mean
A small standard deviation means values cluster near the mean.
In statistics, what is a sample?
AnswerA subset of a population studied to learn about the whole
Samples let researchers study large groups efficiently.
The bell curve is another name for which distribution?
AnswerNormal distribution
The normal distribution has a symmetric bell shape.
Expert level
What is the possible range of a correlation coefficient?
Answer-1 to 1
-1 is perfect negative, 1 is perfect positive correlation.
Which statistician published the t-distribution under the pen name Student?
AnswerWilliam Sealy Gosset
Gosset worked at the Guinness brewery, which led to the pen name.
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