# A heatmap of birthday dates

#### Question Q7.2.2

The data provided in the comma-separated file birthday-data.csv gives the number births recorded by the US Centers for Disease Control and Prevention's National Center for Health Statistics for each day of the year as a total from years 1969-1988. The columns are: month number (1=January, 12=December), day number, and number of live births.

Use NumPy to estimate, for each day of the year, the probability of someone's birthday being on that day. Plot the probabilities as a heatmap like that of Example E7.22 and investigate any features of interest.

Hint: the data need "cleaning" to a small extent – inspect the data file first to establish the presence of any incorrect entries.

#### Solution

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