Question

Honda, Other, Chevy, Toyota, Honda, Toyota, Other, Honda, Ford, Chevy, Honda, Honda, Ford, Toyota, Honda, Honda, Honda, Honda, Toyota, Other, Ford, Ford, Chevy, Chevy, Chevy, Honda, Other, Other, Ford, Chevy

a) Create a relative frequency table containing the categories, frequencies, and relative frequencies. You can do this by hand but the table should be typed.

b) Create a clearly labeled bar chart made using R. Include the commands used to create the bar chart.

c) Interpret the bar chart.

Answer 1

(a)

Category	Frequency	Relative frequency (=Frequency/30)
Chevy	6	6/30=0.2000
Ford	5	5/30=0.1667
Honda	10	10/30=0.3333
Other	5	5/30=0.1667
Toyota	4	4/30=0.1333

(b)

R code:

Category=c("Honda", "Other", "Chevy", "Toyota", "Honda", "Toyota", "Other", "Honda",
"Ford", "Chevy", "Honda", "Honda", "Ford", "Toyota", "Honda", "Honda", "Honda",
"Honda", "Toyota", "Other", "Ford", "Ford", "Chevy", "Chevy", "Chevy", "Honda",
"Other", "Other", "Ford", "Chevy")
counts=table(Category)
barplot(counts, main="Bar chart ",
xlab="categories", ylab="Frequency", col=1:5,
legend = rownames(counts), beside=TRUE)

c. We observed that Honda has maximum frequency so Mode=Honda and other 4 categories are more or less same.