Day 3 Practice

1. Create a new file and save it as "Day_3_Practice.R"
2. Import the dataset mtcars.
3. How many cars have cylinders that are greater than or equal to 6?
4. Make a data frame of cars that have 8 cylinders. Name it mtcars.2.
5. How many cars are in this dataset?
6. What is the mean mpg of the cars with 8 cylinders?
7. How would you find the mean mpg of cars with 8 cylinders without creating a subsetted data frame?

Be sure to annotate what you do as you go!