Use the R code we provided and substitute variables with the ones you want to analyze

INSTRUCTIONS TO CANDIDATES

ANSWER ALL QUESTIONS

To complete this assignment you will need to download a Zip archive from canvas, containing the following files: 

                                                                                                         

                                                                              Data                              qda2020.master.csv

                                                                              Codebook                     qda2020.pdf

                                                                              Assignment text            qda2020.midterm.assignment.pdf (this document)

                                                                              Answer sheet                qda.midterm.000000.docx*

 

 Your submitted assignment should include:

                                                                              Word                           Answer sheet, with your answers and output

                                                                              R                                  The script you have used to address the questions in the assignment

                                                                                                                   and produce the output.

 

Please compress these files into a Zip archive and upload it to Canvas/assignments by Monday, 28 September 2020, before 16:00.

Tips:

1. Use the R code we provided and substitute variables with the ones you want to analyze;

2. Have your codebook at hand, to make sure you understand the attributes.

Please use the answer sheet and answer all of the following five questions

1. Create a frequency table for the variable q12 and answer the following questions:

a. What is the level of measurement of this variable?

b. How many respondent mentioned that they are very confident that they were able to identify fake news?

c. What percentage of respondents said that they were (“very” or “somewhat”) confident that they were able to identify fake news?

d. There were a little more “not very confident” respondents than “very confident” respondents. True or False?

 

* Make sure to change the 000000 to your UM ID number before saving the answer sheet.

2. Create a sample of respondents between the ages of 18 and 19 and answer the following questions:

a. What is the level of measurement of the age variable?

b. How many observations are included in this sample?

c. What percentage of these 18-19 year-olds come across fake news on a daily basis?

d. What percentage of these 18-19 year-olds are (very or somewhat) confident that they are able to identify fake news?

3. Go back to the main data frame and create a bar chart. The chart should show the numbers of respondents owning each of the following: Desktop, laptop, mobile phone, internet connection at home and a tablet computer; in addition add one bar for respondents who do not own any of these devices. The graph should have the following characteristics:

• The plot should have a main title reading "Computing devices ownership", followed by your name and UM ID number;

• The x-axis should be labelled "Number of devices";

• The bars should be red.

To create this chart you will need to run frequency tables for all device-ownership variables (including owning none), write down the number of respondents owning each of these devices, and create a new vector with these values, to plot.

4. Create a boxplot for the number of sources respondents used, broken down by their desktop computer ownership (D1a). Which of the following is NOT true?

a. The minimum number of sources is higher for people who own a desktop computer.

b. The median number of sources is higher for people who own a desktop computer.

c. Outliers were identified for respondents who owned desktop computers but not for respondents who didn’t.

d. 75% of all respondents reported using five sources or less.

5. Create a crosstabulation of gender by Sum of devices R has. NB: your crosstab should present percentages, summarized for the row (gender). Answer the following questions: a. What are the levels of measurement of each of these variables?

b. What percentage of men own all five devices? What percentage of women do?

c. What was the mode number of devices for men? And for women?

d. Men are more likely to own 4 devices than woma

Attachments:

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