Data Camp : Intermediate R Practice

Question 1

hist() is a function to caluclate what?

Answer 1

Histogram

Question 2

boxplot() is use to plot ?

Answer 2

Box plot graph

Question 3

……is a an Error which does not mean a mistake. It refers to a difference between the sample and population that results from not having access to the entire population

Answer 3

sampling error.

Question 4

A proportion refers to the fraction of the total that possesses a certain attribute.

Answer 4

mean() ….

Question 5

print(logs[[i]]$details$message)

Answer 5

, print out the message, available inside the details element of each log entry.

Question 6

when you suppplied argum by both nameand position. if you first supply argum by name , any subsequent vectors that are not by name will be allign to matching by position

Answer 6

Great! keepNA is matched by argument; vec is then matched by position; as the first parameter was matched by name, R matches vec with the first argument of nchar(), which is x