Question

) Let X ={35, 45, 39, 41, 41, 44, 46, 48, 49, 34, 12, 50, 20, 38, 40}(a.) Insert X into R. (a.) Find the mean of X. (b.) Depict X in a boxplot. (NOTE: This question should be answered entirely using code for R.)

Answer 1

Given here is an X where,

(a) Now here we need to insert X into R i.e we need to create an X vector using code in R.

Now we know that to create a vector in R we use the function,

Hence to create a vector and store it in X we need to write the following code in R console,

X<- c(35, 45, 39, 41, 41, 44, 46, 48, 49, 34, 12, 50, 20, 38, 40)

And then press Enter.

To check whether the vector is really stored in X we can write,

 print(X)

The output will be,

[1] 35 45 39 41 41 44 46 48 49 34 12 50 20 38 40

Hence our vector has been succesfully stored in X.

(b) Now since we have created a vector and stored it in X now we need to find the mean of X.

In R to find the mean of a vector stored in X we use a function,

Hence to find the mean of X we write the following code in R console,

 mean(X)

And then press Enter.

The output is,

 [1] 38.8

Hence the mean of the vector X is 38.8

(c) Now here we need to depict X in a boxplot.

That is we need to create a boxplot using X.

In R to create a boxplot we use the function,

Hence to create the boxplot of X we write the following code in R console,

 boxplot(X)

And then press Enter.

The output is,

Clearly we can see that our vector contains two outliers.