Megan Janzen Homework 2

summary(cars)

##      speed           dist       
##  Min.   : 4.0   Min.   :  2.00  
##  1st Qu.:12.0   1st Qu.: 26.00  
##  Median :15.0   Median : 36.00  
##  Mean   :15.4   Mean   : 42.98  
##  3rd Qu.:19.0   3rd Qu.: 56.00  
##  Max.   :25.0   Max.   :120.00

wd<-getwd()
cars<-read.csv("cars_data.csv")

3. What is the average (mean()) mpg for all cars?

mean(cars$mpg)

## [1] 20.09062

4. What is the minimum mpg for all cars?

min(cars$mpg)

## [1] 10.4

5. What is the maximum mpg for all cars?

max(cars$mpg)

## [1] 33.9

6. How many cars are there in the dataset? (Hint: length() of mpg)

length(cars$X)

## [1] 32