The graph below shows the number of car accidents occurring in one city in each of the years 2011 through
2016. The number of accidents dropped in 2013 after a new speed limit was imposed. Does the graph distort the
data? How would you redesign the graph to be less misleading? 
Definitions:
IQ Score
A measure of a person's intelligence as indicated by an intelligence test, where the average score is standardized to 100.
Mean Score
A statistical measure representing the average value of a set of numbers, calculated by dividing the sum of all values by the number of values.
Standard Deviation
A measure of the amount of variation or dispersion of a set of values, indicating how spread out the values are from the mean.
Standard Deviation
A measure of the dispersion or variability within a set of numerical data, indicating how spread out the numbers are.
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