Question 8
How many observations are in the subset under23_and_smoke that you created in the previous exercise, i.e. how many people in the sample are under the age of 23 and have smoked at least 100 cigarettes in their lifetime?
Note: The subset you created is already loaded.
This exercise is part of the course
Data Analysis and Statistical Inference
Exercise instructions
620,771,7,244,10,436,17,591
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