Please run these code chunks before you start.

```
library(vembedr)
library(ggplot2)
library(palmerpenguins)
```

`load("../../Homeworks/Module2/Homework.RData")`

Insert a code chunk to determine what datatype the variables

`FFF`

,`GGG`

,`HHH`

, and`III`

are.Inspect the value of

`GGG`

and`HHH`

in the`Environment`

tab of the`Environments`

pane. What sort of data structures are they?Why are

`GGG`

and`HHH`

different types even though both have the same values?Print out the 31st value of

`FFF`

.Print out the 13th through 23rd values of

`III`

.Print out the value of the variable

`JJJ`

. What kind of data structure is`JJJ`

?Write code to print out the number of row and number of columns of

`JJJ`

.Use the

`summary()`

function to determine datatype of the`col3`

column of`mpg`

.Print out the 17th entry in the 2nd column of

`JJJ`

.Print out the entire column

`col1`

.Print out the 11th row of

`JJJ`

.

**Note: In all plots, give the
plot a title and create proper x-, y- and color-axis (if applicable)
labels with units if available.**

Read about the

`chickwts`

dataset. What kind of variable is`feed`

? What would be an appropriate way to visualize its distribution? Generate the plot.What kind of variable is the weight? What would be an appropriate plot for visualizing its distribution? Visualize its distribution.

What would be an appropriate way to visualize the distribution of weight as it depends on feed? Visualize it. What may be concluded?

What would be an appropriate plot to visualize the proportions of transmission types used in each class of vehicle? Make the plot. In which class of vehicle are manual transmissions most common? In which class of vehicle are automatic transmissions most popular?

In the

`mpg`

dataset, visualize the relationship between engine displacement and the highway mileage. Visualize how this relationship changes with the drive train using facets. What may be concluded?The

`trees`

dataset contains the diameter, height, and volume for black cherry trees. Use`?trees`

in the console to read up on the variables. What kind of variables are the three? What would be an appropriate type of plot to visualize the relationship of all three variables? Make the plot. What can you infer about the relationship between the three variables?

Use a relational operator to write an expression that checks whether the body mass of the 6th penguin in the

`penguins`

dataset is greater than or equal to that of the 33rd penguin and assigns the result to a variable. Print out the value of the variable. What is its datatype? Is the 6th penguin greater than or equal to the 33rd in body mass?The

`sample(x, size, replace = TRUE)`

function generates a random sample of size`size`

from vector`x`

with replacement (the same element of`x`

can be samples multiple times). Assign a vector of the numbers 1 through 6, representing the outcome of a die roll, to a variable. Use the`sample`

function and this vector to randomly sample 100 die rolls and assign the result to another variable. What is the data structure produced by`sample`

? What are its dimensions? How many of these do you expect to be equal to 2? Write an expression that checks which rolls resulted in 2’s and assign to a variable. What data structure and type is this variable? Write an expression to determine how many rolls resulted in 2’s. Did the result match your expectation?Use indexing to assign the 3rd through the 6th value of the 8th row (penguin) in the

`penguins`

dataset to a variable. Do the same for the 150th row. Write a relational statement checking whether the 33rd penguin has smaller measurements than the 8th and assign the result to a variable. What is the data structure or the result? What is the datatype?

Use relational and Boolean operators to determine how many Adelie penguins live on the Biscoe island.

Use the approach from problem #2 above to sample 1000 die rolls and assign to a variable. Sample a second time (representing another die) and assign to another. Then use relational and Boolean operators to determine rolls in which both dice produced 1 or both dice produced 2. How many do you expect? Did the result match expectation?

In the

`mpg`

dataset, determine how many subcompacts were made by Ford, Honda, and Subaru in the year 2008.

Refer to problem 1 in the Boolean operator exercises above. Use logical indexing to subset the penguins dataset for Adelies living on Biscoe and plot

*only*their flipper length vs body mass.Refer to question 3 in the Boolean operator exercises above. Use logical indexing to determine which subcompact models were made by Ford, Honda, and Subaru in 2008?

Are there any flowers in the

`iris`

dataset with petal length more than 10 times petal width? What species have such thin petals? Use relational and Boolean operators and logical indexing to answer.

End of Module 2 HW