Create a New Data Frame

# Create a new data frame

Sometimes you want to save the results of your work to a new data frame. 

Copy the code above and save it to a new data frame called `mental_health_over_30`.

```{r}
mental_health_over_30 <- nhanes %>% 
  filter(age >= 30) %>% 
  group_by(gender) %>% 
  summarize(mean_bad_mental_health_days = mean(days_ment_hlth_bad, na.rm = TRUE)) %>% 
  mutate(mean_bad_mental_health_days = round(mean_bad_mental_health_days, digits = 1)) %>% 
  arrange(desc(mean_bad_mental_health_days))
```