Scores on tests of individual differences, including intelligence test scores, often follow a pattern in which most scores are in the average range, with fewer scores in the extremely high or extremely low range. what is this pattern of distribution of scores called?

a) the normal distribution
b) the reliability distribution
c) the standered distribution
d) the variability distribution

A

Explanation:

The pattern of distribution is called normal distribution ( Gaussian distribution). It has a bell shape and symmetric about the average or mean meaning  most of the data are close to the average scores while a fewer scores in extremely high or extremely low range. 68% of the scores in a normal distribution are within ± one standard deviation of the mean, 95 % of the score are within ± two standard deviation form the mean and 99.7% are within three standard deviation from the mean

early settlements on the subcontinent. both the indus and the ganges rivers carried rich silt from the mountains to the plains. when the rivers flooded, the silt spread over the plains and made the soil in the river valleys fertile for farming.