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STAT240 Exam 1 Prep Solution
You have three hours to complete the exam from the time that you begin the Canvas quiz which gives you access to the exam documents.
Piazza will be disabled during the exam and for several days after.
Set-up
Inside your course directory STAT240 , add these additional directories.
STAT240/exams/
STAT240/exams/midterm_1
Download the following data set from the course repository and put them into your STAT240/data/ directory.
This file and other exam files should be placed in STAT240/exams/midterm_1 .
Exam datasets
The following chunk reads in the data sets used in the exam.
These lines of code will only work if you have your file directories set up correctly according to the instructions above. If you get a “file does not exist error”, then most likely one of the following has happened.
There is a mismatch between the file path inside read_csv and the file structure on your personal computer. The files are set up correctly, but the .csv file is not in the correct location on your computer.
You are strongly encouraged to perform a thorough exploration of the data sets ahead of time!
Data Set 1: Volleyball
You do not need to know anything about volleyball to be able to answer the questions.
There are 332 such teams and their identities are recorded with a number in Team_Index , their name in Team , and a conference affiliation in Conference .
Other variables contain various summary statistics and will be defined if needed in certain questions.
Data Set 2: States
The states data set has a single row for each of the 50 states in the USA.
There are multiple other variables, some of which are categorical and some of which are numerical. Variables will be defined as necessary in exam questions which use them.
Data Set 3: Cities
The cities data set has a single row for each state, district, or federal territory in the USA and columns with the name and population for the largest city within each of these entities.
Data exploration
You are strongly encouraged to explore both data sets prior to beginning the exam. Optionally, for each of the three datasets, write down or make a mental note of the following.
How many rows does the data have?
What are the columns names and column types? Use glimpse .
Are any of the columns within the dataset directly related to each other?
What are some interesting research questions we could answer with this dataset?
Exam
When you open the exam assignment on Canvas, your 3-hour timer will start and you will be able to download an .Rmd file containing the exam questions. The format is very similar to homework assignments. You’ll write your answers and code within the same .Rmd and knit it to an .html.
Knit the document frequently as you work on it.
Make sure to turn in the R Markdown file and the knitted HTML file before your quiz time runs out.
Piazza will be disabled during the exam and for several days after.
Set-up
Inside your course directory STAT240 , add these additional directories.
STAT240/exams/
STAT240/exams/midterm_1
Download the following data set from the course repository and put them into your STAT240/data/ directory.
This file and other exam files should be placed in STAT240/exams/midterm_1 .
Exam datasets
The following chunk reads in the data sets used in the exam.
These lines of code will only work if you have your file directories set up correctly according to the instructions above. If you get a “file does not exist error”, then most likely one of the following has happened.
There is a mismatch between the file path inside read_csv and the file structure on your personal computer. The files are set up correctly, but the .csv file is not in the correct location on your computer.
You are strongly encouraged to perform a thorough exploration of the data sets ahead of time!
Data Set 1: Volleyball
You do not need to know anything about volleyball to be able to answer the questions.
There are 332 such teams and their identities are recorded with a number in Team_Index , their name in Team , and a conference affiliation in Conference .
Other variables contain various summary statistics and will be defined if needed in certain questions.
Data Set 2: States
The states data set has a single row for each of the 50 states in the USA.
There are multiple other variables, some of which are categorical and some of which are numerical. Variables will be defined as necessary in exam questions which use them.
Data Set 3: Cities
The cities data set has a single row for each state, district, or federal territory in the USA and columns with the name and population for the largest city within each of these entities.
Data exploration
You are strongly encouraged to explore both data sets prior to beginning the exam. Optionally, for each of the three datasets, write down or make a mental note of the following.
How many rows does the data have?
What are the columns names and column types? Use glimpse .
Are any of the columns within the dataset directly related to each other?
What are some interesting research questions we could answer with this dataset?
Exam
When you open the exam assignment on Canvas, your 3-hour timer will start and you will be able to download an .Rmd file containing the exam questions. The format is very similar to homework assignments. You’ll write your answers and code within the same .Rmd and knit it to an .html.
Knit the document frequently as you work on it.
Make sure to turn in the R Markdown file and the knitted HTML file before your quiz time runs out.
1 file (34.2KB)
