Statistics For Dummies, 2nd Edition. If a statistical data set has a normal distribution, it is customary to standardize all the data to obtain standard scores known as z-values or z-scores. The distribution of z-values takes on a standard normal distribution (or Z-distribution). The standard normal distribution is a special normal distribution with a mean equal to 0 and a standard deviation equal to 1. A standard normal (Z-) distribution has a bell-shaped curve with mean 0 and standard deviation 1. The standard normal distribution is useful for examining the data and determining statistics like percentiles, or the percentage of the data falling between two values.
Antioch is one of the oldest towns in California. In 1848, John Marsh, owner of Rancho Los Meganos, one of the largest ranches in California, built a landing on the San Joaquin River in what is now Antioch. It became known as Marsh's Landing, and was the shipping point for the 17,000-acre rancho.
Colton is a city in San Bernardino County, California, United States. The city is located in the Inland Empire region of the state and is approximately 57 miles east of Los Angeles. The population of Colton is 52,154 according to the 2010 census, up from 47,662 at the 2000 census.