<Tr> <Td> 7000164485400000000 ♠ 1.644 854 σ </Td> <Td> 90% </Td> <Td> 10% </Td> <Td> 1 / 10 </Td> </Tr> <Tr> <Td> 7000195996400000000 ♠ 1.959 964 σ </Td> <Td> 95% </Td> <Td> 5% </Td> <Td> 1 / 20 </Td> </Tr> <Tr> <Td> 2σ </Td> <Td> 7001954499736000000 ♠ 95.449 9736% </Td> <Td> 7000455002640000000 ♠ 4.550 0264% </Td> <Td> 1 / 7001219778950000000 ♠ 21.977 895 </Td> </Tr> <Tr> <Td> 7000257582900000000 ♠ 2.575 829 σ </Td> <Td> 99% </Td> <Td> 1% </Td> <Td> 1 / 100 </Td> </Tr>

Dividing the difference between a data value and the mean by the standard deviation