you need to download r studio below packages

This problem set uses theheightsdataset from thedslabspackage, which consists of actual heights (in inches) of students in 3 Harvard biostatistics courses.

Install thedslabspackage from CRAN, then load thedslabspackage into your workspace with thelibrary()command.

After loading the package, load the datasetheightsinto your workspace:

data(heights) heights 

Q1: Object Classes

Match each object to its corresponding class.(select options like character string,data.frame,factor vector,integer,list,numeric,numeric vector)

heightsdataset select option

sexcolumn select option

heightcolumn select option

"Male" select option

75.00000 select option

Q2: Object Dimensions

How many rows are in this dataset?

Q3: Indexing - 1

What is the height in row 777?

Q4: Indexing - 2

Which of these pieces of code returns the sex in row 777?

Check all correct answers.

heights$sex[777]

heights[1, 777]

heights[777,1]

Q5: Maximum and Minimum

What is the maximum height in inches?

Which row has the minimum height?

Q6: Summary Statistics

What is the mean height in inches?

What is the median height in inches?

Q7: Conditional Statements- 1

What proportion of individuals in the dataset are male?

Q8: Conditional Statements - 2

How many individuals are taller than 78 inches (roughly 2 meters)?

Q9: Conditional Statements - 3

How many females in the dataset are taller than 78 inches?