Order Markdown Codes Assignment

Order Markdown Codes Assignment
This is a list of 6 exercises for the Applied Quantitative Methods with R labs. You can solve these exercises using base R functionalities or functions from the tidyverse (e.g. dplyr ) package. Solutions should be send via moodle platform. Outputs are presented in html tables but only for comparison purposes. You do not need to create html tables. Note that solving some of these exercises requires going through help pages or looking for an appropriate function in the packages documentation.
Deadline to send solutions is the 9th of January 2023.
If you have questions do not hesitate to contact us via email.
2 Exercise 1 (1 pt)
The sum of the squares of the first ten natural numbers is,
The square of the sum of the first ten natural numbers is,
Hence the difference between the sum of the squares of the first ten natural numbers and the square of the sum is .
Find the difference between the sum of the squares of the first one hundred natural numbers and the square of the sum.
Result: -25164150 .
3 Exercise 2 (1 pt)
Order Markdown Codes Assignment
Write an R program to create a data.frame which contain the following details
employee salary
Jane B 1000
David G 2500
Emilo A 1500
Assignments for extra 10 pts
Maciej Beręsewicz, Tomasz Klimanek, Marcin Szymkowiak AUTHOR
12 22 . . . 102 = 385
(1 2 . . . 10)2 = 552 = 3025
385 − 3025 = −2640
employee salary
Janet F 3000
George H 680
and display summary of the data.
4 Exercise 3 (1 pt)
Order Markdown Codes Assignment
Download this dataset. The dataset is about the number of foreigners insured in Poland according to the ZUS data. It contains the following columns:
kwartal – quarter (format: YYYYQQ, i.e. 2021Q1 refers to 1 quarter of 2021) obywatelstwo – citizenship (in Polish) wiek – age group (levels: ogol, 19, 20-24, 25-29, 30-34, 35-39, 40-44, 45-49, 50-54, 55-59, 60- 64, 60 , 65 , where ogol refers to total ), plec – sex (levels: ogol, kob, mez , where ogol refers to total , kob to females and mez to males ), ubezp – the number of insured people.
Your task in this assignment consists of two steps:
1. read the data using appropriate function from the readr package or base R (0.5 pt), 2. rename the columns using the following rules (0.5 pt),
kwartal to quarter , obywatelstwo to citizenship , wiek to age , plec to sex , ubezp to count .
The expected result is presented below.
quarter citizenship age sex count
2019Q1 ALBAŃSKIE ogol ogol 369
2019Q1 ALGIERSKIE ogol ogol 592
2019Q1 AMERYKAŃSKIE ogol ogol 1792
2019Q1 ANDORSKIE ogol ogol 6
2019Q1 ANGOLSKIE ogol ogol 142
2019Q1 ARGENTYŃSKIE ogol ogol 177
5 Exercise 4 (2 pt)
Create the following data.frame containing information about the overall number of foreigners in Poland according to ZUS data. Column quarter refers to the quarter column and Freq is based on the count column.

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