Is 115 a good IQ for a 12 year old?

Most scores are somewhere between 85 and 115. Those scores are considered the “average” or normal intelligence range.

What is the probability that you would find an IQ score of 70 or below?

Outside of these values, statisticians consider the scores to be “extreme” or different from the normal population. Only 5\% of the population will have IQ scores above 130 or below 70.

What percentage of citizens have an IQ score that falls between 80 and 100?

e.g. IQ is normally distributed (mean = 100, SD = 15). 68\% of people have IQs between 85 and 115 (100 +/- 15). 95\% have IQs between 70 and 130 (100 +/- (2*15). 99.7\% have IQs between 55 and 145 (100 +/- (3*15).

What is the probability that students have IQ score of 130 or below?

Based on the 68-95-99.7 Rule, approximately 68\% of the individuals in the population have an IQ between 85 and 115. Values in this particular interval are the most frequent. Approximately 95\% of the population has IQ scores between 70 and 130. Approximately 99.7\% of the population has IQ scores between 55 and 145.

What percentage of the population has an IQ between 85-130?

The light blue shaded portion of the graph represents one standard deviation above and below the average IQ. As you can see, roughly 68\% of people fall in this range of IQs between 85 and 115. Moving out one more standard deviation (IQs between 70-130) will account for more than 96\% of the population.

What is the IQ range with a higher standard deviation?

A higher standard deviation means there is a greater spread in the results. The light blue shaded portion of the graph represents one standard deviation above and below the average IQ. As you can see, roughly 68\% of people fall in this range of IQs between 85 and 115.

What is the average IQ range for IQ tests?

IQ tests are designed to use 100 as the normed average score. In fact, half of all IQ scores fall between 90 and 110. The standard deviation for an IQ score is 15 points. So, 70 percent of all IQ scores fall between 85 and 115 points.

Why do IQ test classifications for individuals vary?

IQ classifications for individuals also vary because category labels for IQ score ranges are specific to each brand of test. The test publishers do not have a uniform practice of labeling IQ score ranges, nor do they have a consistent practice of dividing up IQ score ranges into categories of the same size or with the same boundary scores.