Máy tính thống kê

Analyse any data set in seconds — median, spread, z-scores and combinatorics, free and private in your browser.

Máy tính trung vị & mốt

Find the median, mode, sum, count, minimum and maximum of any list of numbers.

Máy tính độ lệch chuẩn

Get both the population and sample standard deviation of a data set, with the mean shown for context.

Máy tính phương sai

Measure how spread out a data set is with population and sample variance.

Máy tính điểm Z

See how many standard deviations a value lies from the mean with z = (x − μ) / σ.

Máy tính hoán vị & tổ hợp

Count arrangements and selections instantly — nPr for ordered picks and nCr for unordered ones.

Máy tính khoảng biến thiên

Find the range of a data set — the difference between its largest and smallest values.

Máy tính hệ số biến thiên

Compare the relative spread of data sets with CV = σ / μ expressed as a percentage.

Máy tính trung điểm

Compute the midrange — the midpoint between the minimum and maximum of a data set.