R Basics

Which of the following command will help you to generate 10 random values between 1000 and 2000?

• sample(1000:2000,10)

• seq(1000,2000,10)

• sample(1000,2000,10)

• seq(1000:2000,10)

How to find the total number of data in a variable 'x'?

• size(x)

• length(x)

• number(x)

• data(x)

Which command is used to find an average value of data 'x'?

• ave(x)

• mean(x)

• average(x)

• sum(x)

What is the purpose of using head(x)?

• Returns first 6 values of x

• Returns all the values of x

• Returns last 6 values of x

• Returns central values of x

Can you choose the write command to find the value of 8/39 as 0.2051?

• approx(8/39,4)

• vpa(8/39,4)

• round(8/39,4)

• scale(8/39,4)

Which of the following command is used to find 20 random values between 20 and 30 ?

• sample(20,20:30,T)

• sample(20:30,20)

• sample(20:30,20,T)

• sample(20,20:30)

Which of the following command gives us the data 'x' in descending order?

• sort(x,TRUE)

• sort(x,decreasing=T)

• sort(x,T)

• All the given commands are true

The function used to generate a set of random integers from the specified set of numbers without repetition is

• sample()

• random()

• sequence()

• generate()

All the basic statistical information can be seen using the command_____

• summary()

• plot()

• view()

• disp()

What is the command for invoking packages in R.

• library()

• Library()

• invoke()

• package()