The major characteristics of a normal probability distribution are : 1. The normal distribution of mean, mode and median are always equal. 2. These are symmetrical around the mean. 3. The area around the normal curve in a normal distribution is equal to 1. 4. Generally, a normal distribution is defined by the mean and standard deviation.
The factors that influence the personality of a person are broad of two types - one is the individual factors and the second is the environmental factors.
From the given list, aptitude is a type of individualfactor that influences a person's personality as an aptitude is a person's factor which is usually not changeable and is an inherent factor that is not influenced by the environment.