Statistics
Calcolatore del punteggio Z
Calculate the standard score (z-score) for a data point
Z-Score1.5000 Vedi risultati
Risultati in tempo reale
Z-Score
1.5000
The standardized score (number of standard deviations from the mean)
Percentile
93.32%
The percentile rank of the value
Percentage Above
6.68%
Percentuale di valori sopra questo punto
Dati di ingresso supportati
| Dato | Descrizione |
|---|---|
| Mode | single · compare |
| Raw Value (x) | L'osservazione da convertire in punteggio z |
| Mean (μ) | The mean of the population or sample |
| Standard Deviation (σ) | Must be greater than 0 |
| Raw Value 2 (x₂) | Secondo valore da una distribuzione diversa |
| Mean 2 (μ₂) | |
| Standard Deviation 2 (σ₂) |
Formula
Z-Score Formula: z = (x - μ) / σ Where: - x is the data point value - μ is the mean of the population or sample - σ is the standard deviation of the population or sample The z-score represents how many standard deviations a data point is from the mean. A positive z-score indicates the data point is above the mean, while a negative z-score indicates it is below the mean. Finding a value from a z-score: x = μ + (z × σ) The standard normal distribution has a mean of 0 and a standard deviation of 1.
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