100% tevredenheidsgarantie Direct beschikbaar na je betaling Lees online óf als PDF Geen vaste maandelijkse kosten
logo-home
Practice Questions (Theory) Statistics 3 Year 3.4 Psychology €3,99
In winkelwagen

Tentamen (uitwerkingen)

Practice Questions (Theory) Statistics 3 Year 3.4 Psychology

 8 keer verkocht

This document contains over 70 practice questions covering the theory (no calculations!) of Statistics 3 of the third year of psychology. The questions are open-ended and the answers are explained extensively. All questions are based on the literature and lectures.

Voorbeeld 3 van de 27  pagina's

  • 21 maart 2022
  • 27
  • 2021/2022
  • Tentamen (uitwerkingen)
  • Vragen en antwoorden
Alle documenten voor dit vak (3)
avatar-seller
mandyrose
Content
Questions ……………………….…………………………………………………………….2
Week 1…………………………………………………………………………………………2
Week 2………………………………………………………....................................................6
Week 3…………………………………………………………………………………………6
Week 4…………………………………………………………………………………………7
Week 5…………………………………………………………………………………………7
Week 6………………………………………………………………………………………..12
Questions and answers……………………………………………………………………...15
Week 1………………………………………………………………………………………..15
Week 2………………………………………………………..................................................18
Week 3………………………………………………………………………………………..19
Week 4………………………………………………………………………………………..20
Week 5………………………………………………………………………………………..20
Week 6………………………………………………………………………………………..25




1

,Questions
Week 1
1. What is the difference between descriptive and inferential statistics?
Descriptive statistics are graphs, tables, and numerical summaries such as means and
percentages that are used to easily describe data and make it understandable. Statistical
inferences (inferential statistics) are predictions about a population using data from a
sample of that population.
2. What is the difference between validity and reliability?
A measurement must have validity and reliability. Validity means that the
measurement must measure what it intends to measure. A lack of validity leads to bias.
Reliability implies that the measurement must be consistent in the sense that a subject
gives the same answer when asked again. A lack of reliability leads to errors.
3. What are the four different measurement levels and their associated properties?
Enables Enables Uses equal Has real zero
categorization ranking intervals point
Nominal X
Ordinal X X
Interval X X X
Ratio X X X X


4. What is the difference between discrete and continuous variables?
A variable is discrete if its possible values form a series of discrete numbers with spaces
between them. A variable is continuous if it can have an infinite continuum of possible
real numbers (including decimals).
5. What are the three types of bias that can lead to different results from sample to sample?

• Sampling bias. In non-probability samples, it is not possible to determine the
probabilities of the possible samples. Non-probability sampling leads to sample
bias. There are three types of non-probability sampling:
o Voluntary sampling. Only volunteers as test subjects.
o Selection bias. Only one type of subject.
o Underrepresentation. The sample lacks representation of some groups
within the population.
• Response bias. Poorly worded or confusing questions (or other outside
influences) cause people to answer incorrectly.
• Non-response bias. This happens when some of the subjects cannot be reached or
refuse to participate, resulting in missing data.




2

, 6. What is systematic random sampling?
This method consists of three steps:
1. Skip number (k) = population (N) / sample (n)
2. Randomly select a subject from the first k names in the sampling frame.
3. Select every kth topic listed next.
7. What are stratified random samples and when are they (dis)proportionate?
Stratified random sampling is a type of probability sampling where the population is
divided into separate groups called strata and then a simple random sample is selected
from each stratum. Stratified random samples are proportional if the proportions of the
strata are the same as those in the entire population. Stratified random samples are
disproportionate if the proportions of the strata differ from the population proportions;
this is used when the group is such a small part of the population that it may not be
sufficiently represented in a simple random sample to allow for accurate inferences.
8. What are cluster samples?
Cluster sampling is a type of probability sampling; it divides the population into a large
number of clusters, such as city blocks, and selects a random sample of clusters in which
all people are used as subjects in the sample.
9. What is multi-stage sampling?
A type of probability sampling: Clusters are randomly selected and people within those
clusters are randomly selected as subjects.
10. What is the empirical rule?
The empirical rule states that if a histogram is bell-shaped, then;
1. About 68% of the observations lie between 𝒚 ̅ − 𝒔and 𝒚
̅ + 𝒔.
2. About 95% of the observations lie between 𝒚 ̅ − 𝟐𝒔 and 𝒚
̅ + 𝟐𝒔.
̅ − 𝟑𝒔and 𝒚
3. All or almost all observations lie between 𝒚 ̅ + 𝟑𝒔.




3

Dit zijn jouw voordelen als je samenvattingen koopt bij Stuvia:

Bewezen kwaliteit door reviews

Bewezen kwaliteit door reviews

Studenten hebben al meer dan 850.000 samenvattingen beoordeeld. Zo weet jij zeker dat je de beste keuze maakt!

In een paar klikken geregeld

In een paar klikken geregeld

Geen gedoe — betaal gewoon eenmalig met iDeal, creditcard of je Stuvia-tegoed en je bent klaar. Geen abonnement nodig.

Direct to-the-point

Direct to-the-point

Studenten maken samenvattingen voor studenten. Dat betekent: actuele inhoud waar jij écht wat aan hebt. Geen overbodige details!

Veelgestelde vragen

Wat krijg ik als ik dit document koop?

Je krijgt een PDF, die direct beschikbaar is na je aankoop. Het gekochte document is altijd, overal en oneindig toegankelijk via je profiel.

Tevredenheidsgarantie: hoe werkt dat?

Onze tevredenheidsgarantie zorgt ervoor dat je altijd een studiedocument vindt dat goed bij je past. Je vult een formulier in en onze klantenservice regelt de rest.

Van wie koop ik deze samenvatting?

Stuvia is een marktplaats, je koop dit document dus niet van ons, maar van verkoper mandyrose. Stuvia faciliteert de betaling aan de verkoper.

Zit ik meteen vast aan een abonnement?

Nee, je koopt alleen deze samenvatting voor €3,99. Je zit daarna nergens aan vast.

Is Stuvia te vertrouwen?

4,6 sterren op Google & Trustpilot (+1000 reviews)

Afgelopen 30 dagen zijn er 65823 samenvattingen verkocht

Opgericht in 2010, al 15 jaar dé plek om samenvattingen te kopen

Begin nu gratis
€3,99  8x  verkocht
  • (0)
In winkelwagen
Toegevoegd