Liu Chuang (snooker player) Liu Chuang (snooker player) Liu Chuang (Chinese: 刘闯, pinyin: Liú Chuǎng, born 6 June 1990) is a Chinese former professional snooker player. Liu grew up in Liaoning province in northeast China. Near his parents' house there was a snooker table and when he was 10 he played on it and liked it a lot. His father noticed his potential, and supported him as did the person who owned that table, who became his first coach. When he was 13, Liu travelled thousands of miles to play in southern China, where there were more professionals. There he improved and began to
Standard normal table the standard normal table to find probabilities. Normal distributions are symmetrical, bell-shaped distributions that are useful in describing real-world data. The "standard" normal distribution, represented by the letter Z, is the normal distribution having a mean of 0 and a standard deviation of 1. If "X" is a random variable from a normal distribution with mean μ and standard deviation σ, its Z-score may be calculated from X by subtracting μ and dividing by the standard deviation: For the average of a sample of size n from some population in which the mean is μ and the standard deviation is