100% satisfaction guarantee Immediately available after payment Both online and in PDF No strings attached
logo-home
Previously searched by you
Previously searched by you
logo
Samenvatting Statistiek 2 voor bedrijfseconomische wetenschappen WPO $5.05
Add to cart
Quickly navigate to
Preview
  2.  
  3. Vrije Universiteit Brussel (VUB)
  4.  
  5. Toegepaste Economische Wetenschappen
  6.  
  7. Statistiek 2

Summary

Samenvatting Statistiek 2 voor bedrijfseconomische wetenschappen WPO

 5 purchases
  • Course
  • Statistiek 2
  • Institution
  • Vrije Universiteit Brussel (VUB)
  • Book
  • Business Statistics, Global Edition

Alle werkcolleges van statistiek 2 voor bedrijfseconomische wetenschappen. Ook alle opgaven en oplossingen van de extra oefeningen zijn toegevoegd in het document.

Last document update: 3 year ago

Preview 4 out of 129  pages

Document information

  • No
  • Hoofdstuk 1-16, 22
  • May 13, 2021
  • May 26, 2021
  • 129
  • 2020/2021
  • Summary

Subjects

  • tew
  • handelsingenieur
  • statistiek 2
  • statistiek
  • hi
  • toegepaste economische wetenschappen
  • statistiek 2 voor bedrijfseconomische wetenschappen

Connected book

book image

Book Title:

Author(s):

  • Edition:
  • ISBN:
  • Edition:

Written for

  • Vrije Universiteit Brussel (VUB)
  • Toegepaste Economische Wetenschappen
  • Statistiek 2
All documents for this subject (6)

Seller

avatar-seller
paulineverhelst

Reviews received

Content preview

STATISTIEK 2
WPO
Prof. Dr. L. Vanhaverbeke




Pauline Delphine Verhelst

VUB | 2020-2021

0

,Inhoudsopgave

WPO 1: R en R-studio ......................................................................................................................................2
1. Basics R ...................................................................................................................................................... 2
2. Werken met geïmporteerde data .............................................................................................................. 3
3. Visualising data – gebruik van grafieken .................................................................................................. 5

WPO 2: Hoofdstuk 9 ........................................................................................................................................7
Oefeningen in WPO: 4, 35, 75, 5, 33, 71, 79 ....................................................................................................... 7
Oefeningen zelf te maken: 6, 7, 8, 9, 10, 30, 31, 32, 34, 70, 72, 73, 74 ............................................................ 10

WPO 3: Hoofdstuk 10 .................................................................................................................................... 15
Oefeningen in WPO: 11, 28, 39, 15, 23 ............................................................................................................. 15
Oefeningen zelf te maken: 12, 13, 15, 16, 19, 23, 25, 35, 36, 43, 44 ................................................................ 20

WPO 4: Hoofdstuk 11 .................................................................................................................................... 24
Oefeningen in WPO: 25, 26, 31, 33, 52, 53 ....................................................................................................... 24
Oefeningen zelf te maken: 1-20, 21, 22, 23, 29, 30, 31, 35, 36, 37, 42, 43, 45, 48 ........................................... 29

WPO 5: Hoofdstuk 12 .................................................................................................................................... 40
Oefeningen in WPO: 27, 29, 37, 47, 51 ............................................................................................................. 40
Oefeningen zelf te maken: 1-14, 19-24, 28, 29, 33, 34, 35 ............................................................................... 43

WPO 6: Hoofdstuk 13 .................................................................................................................................... 51
Oefeningen in WPO: 26, 32, 34, 55, 80 ............................................................................................................. 51
Oefeningen zelf te maken: 1, 2, 3, 5, 6, 9, 10, 13, 14, 17, 18, 19, 20, 23, 24, 25, 39, 40, 57 ............................. 55

WPO 7: Hoofdstuk 14 .................................................................................................................................... 63
Oefeningen in WPO: 25, 32, 43, 45, 22 ............................................................................................................. 63
Oefeningen zelf te maken: 1-11, 13, 14, 15, 21, 23, 26, 36, 38, 42, 45, 53, 54 ................................................. 68

WPO 8: Hoofdstuk 4 ...................................................................................................................................... 79
Oefeningen in WPO: 32, 36, 40, 46, 48, 68 ....................................................................................................... 79
Oefeningen zelf te maken: 1-25, 33, 34, 37, 40, 43, 52, 57, 58, 60, 62 ............................................................ 83

WPO 9: Hoofdstuk 15 .................................................................................................................................... 93
Oefeningen in WPO: 30, 37, 39, 54, 57 ............................................................................................................. 93
Oefeningen zelf te maken: 3-6, 8, 11, 12, 16-22, 26, 27, 41-45, 53, 55 ............................................................ 97

WPO 10: Hoofdstuk 16 ................................................................................................................................ 107
Oefeningen in WPO: 21, 40, 49, 53, 60 ........................................................................................................... 107
Oefeningen zelf te maken: 1-8, 12-14, 22-24, 27, 28, 31, 39, 41, 50, 51 ........................................................ 111

WPO 11: Hoofdstuk 22 ................................................................................................................................ 118
Oefeningen in WPO: 6, 17, 22, 26, 30 ............................................................................................................. 118
Oefeningen zelf te maken: 1-10, 13, 14, 17, 19, 21, 23, 28-32 ....................................................................... 122


1

,WPO 1: R en R-studio
1. Basics R
- Importeren van files
o Tab: Tools à global options à map selecteren
- Shortcuts
o CTRL+ENTER
§ Executes on the command line the script line containing the cursor
o Up Arrow
§ [In console] Cycles through previously entered commands
o TAB
§ Activates autocomplete - very useful for functions and variable names
o ESC
§ Interrupt currently executing command
§ Useful when R gets stuck
- Basic Math in R
o R understands the four arithmetic functions: +, -, *, /
o Exponents via ^
- Creating basic objects
o Numeric object
§ a <- 2
§ b <- 3
- Character object
o my_name <- "Elizabeth Smith"
- Class functie
o Uitvoeren van een functie
o Kan bv door class(c)
- Creating vector objects
o Vectors are a collection of data of the same type (strings, numbers, ...)
o We can use the c(...) command to create vectors
o Bv: products <- c("A", "B", "C", "D", "E")
o Bv: prices <- c(5, 10, 12, 8, 15)
o Vectors kunnen vermenigvuldigd worden, er kunnen berekeningen mee
gedaan worden.
§ Met elkaar of met een constante
§ Bv: products2 <- products * 5
§ Bv: taxes <- products*prices
- Descriptive statistics
o Summary statistics can be calculated on vectors
o Belangrijke functies:
§ max(...) = hoogste waarde van een vector
§ min(...) = laaagste waarde van een vector
§ range(...) = laagste en hoogste waarde van een vector
§ length(...) = som van aantal elementen in een vector
§ mean(...) = gemiddelde van een vector
§ median(…) = mediaan van een vector


2

, § var(...) = variantie van een vector
§ sd(...) = standaard afwijking van een vector
§ sort(...) = sorteren van klein naar groot 0
§ soort (x, decreasing = TRUE) = sorteren van groot naar klein
§ prod(...) = product van alle waarden van de vector
§ quantile(vector, percentage/ gevraagde quantile) = quantillen
berekenen
§ summary(…) = samenvatting van belangrijkste elementen (min, 1st
quantile, median, mean, 3th quantile, max)
§ cor(...) = correlatie tussen 2 vectoren
§ sum(...) = som van de elementen van de vector
- Indexing
o Indexing allows to select specific elements from a vector (e.g. non-missing
values)
o Missing values are often indicated by the 'NA' expression
o Bv: z <- c(327, NA, 455, 623, 712, 421, 393, 556, NA, 739, 102, 744)
o Eerste getal uit vector z opvragen: z[1]
o Laatste getal van de vector z: z[length(z)]
o Eerste x getallen uit vector z: z[1:x]
o Welke getallen zijn NA: is.na(z)
§ TRUE if the element is NA and FALSE otherwise
o Vector met zelfde lengte als z, met FALSE als het element NA is en TRUE
otherwise: ! is.na(z)
§ ! in r is ‘niet’, gebruiken om een functie tbae inverteren
o Alle elementen selecteren die niet missen: z[!is.na(z)]
o We kunnen deze vector dan opnieuw opslaan onder een nieuwe naam
o Als we willen weten of een waarde bv groter dan 500
§ z > 500
§ FALSE wilt zeggen dat de waarde kleiner is dan 500, TRUE groter
2. Werken met geïmporteerde data
- Werken met een dataset
o Werken met een dataframe
o Inlezen van een dataframe
§ Tabellen en kolommen
- Importeren
o File à import file à from text
o Order: read.csv(…)
§ Commando werkt enkel als de map al gekozen was (zie begin)
o Read.csv(file.choose(…))
- Inspecting
o Find out the structure of the dataset you can
§ str(...) function
§ Hierdoor krijgen we een beschrijving van hoe de dataset er uit ziet
o head(...) and tail(...) functions
§ Geven de eerste een laatste 6 observaties
§ Er kunnen ook meer rijen verkregen worden door head(students, x)



3

The benefits of buying summaries with Stuvia:

Guaranteed quality through customer reviews

Guaranteed quality through customer reviews

Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.

Quick and easy check-out

Quick and easy check-out

You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.

Focus on what matters

Focus on what matters

Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!

Frequently asked questions

What do I get when I buy this document?

You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.

Satisfaction guarantee: how does it work?

Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.

Who am I buying these notes from?

Stuvia is a marketplace, so you are not buying this document from us, but from seller paulineverhelst. Stuvia facilitates payment to the seller.

Will I be stuck with a subscription?

No, you only buy these notes for $5.05. You're not tied to anything after your purchase.

Can Stuvia be trusted?

4.6 stars on Google & Trustpilot (+1000 reviews)

64670 documents were sold in the last 30 days

Founded in 2010, the go-to place to buy study notes for 15 years now

Start selling

Recently viewed by you

Summary ·

(1)

Summary Exam Psychotherapy & Therapeutic Skills UvA Year 2

Exam (elaborations) ·

(0)

TEST BANK FOR NURSING INFORMATICS FOR THE ADVANCED PRACTICE NURSE

Package deal ·

(0)

Test Banks Package deal For Nursing Research,,,The Real Deal

Other ·

(0)

applied science unit 4 assignment C synthesising an Aspirin

Exam (elaborations) ·

(0)

ATI- RN Leadership Exam | Latest Update | 100% Correct | Verified Answers

Exam (elaborations) ·

(0)

Michigan Residential Builder's License QuizBank (100% Already Solved)

Exam (elaborations) ·

(0)

FLORIDA FDLE LAW ENFORCEMENT ACADEMY - STATE EXAM TEST REVIEW

Exam (elaborations) ·

(0)

AP Art History Global Contemporary questions with correct answers

Exam (elaborations) ·

(0)

Pediatric Nursing Ch 4 Exam Questions with Verified Answers

$5.05  5x  sold
  • (0)
Add to cart
Added