Question

1. Which of the following functions in R can be used to inspect data object? Select all that apply.

rm

glimpse()

head()

plot

2. To get an overview of your data, one can use the function:

ls()

args()

summary()

list()

5. Numerical summaries/characteristics of the population are called parameters.

True

False

Answer 1

1. rm is not useful in inspecting a data object. As it is used to removes the data object.

glimpse () is used to show the glimpse of data object. From, this command we can find the structure of data object.

head() is used to show upper 7 observation of data set. Hence, it is used to inspect data set.

plot is a command used to plot the graph of data object from which can't be useful in inspecting the data object.

2. ls() is used to show the data set and function defined by user.

args() defines the argument and their default value.

summary () is useful command which gives summary statistic for a data set such as mean, median, etc.

list() defines the structure of function

Therefore, they all can be used for overview of data.

3. Yes, the characteristics of population are called parameters.