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What does a bell curve of IQ look like?
The "bell curve" of anything, with the peak of the curve supposedly at a score of 100.
Why if a probability distribution curve is bell shaped why is this a normal distribution?
A bell shaped probability distribution curve is NOT necessarily a normal distribution.
Is it true that a normal distribution curve is symmetric about the mean?
yup, it's a bell curve
What is a bell curve?
A bell curve is a symmetrical bell-shaped graph curve that represents the arrangement of values, how often something occurs, or probability of occurance of a set of data. It slopes downward from a point in the middle corresponding to the average also called mean value, or the maximum probability. Gather all the results of an IQ test and make a graph of them, would create a bell curve with average IQ being the mean value. The more results or values, the better the bell curve. It can be made with a line graph or a bar graph.
What is the shape of normal probability curve?
bell shaped
