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Load and explore data. Conduct simple data analysis.
Check data quality – NAs and imputation
10. Imputing NAs
Define customer activity levels
Congratulations

## Instruction

Looks like we've got some NAs to deal with! Let's impute them.

## Exercise

Replace the NAs under the categories_3m column with the average value of that same column. The average must be rounded – we want to impute NAs with whole numbers, not floating-point numbers.

### Stuck? Here's a hint!

Use mean(), but don’t forget to set the optional na.rm argument to TRUE. Round the result.