Tentamen (uitwerkingen)
WGU C955 - Module 6: Correlation & Regression Exam Questions and Answers
- Vak
- Instelling
WGU C955 - Module 6: Correlation & Regression Exam Questions and Answers
[Meer zien]Voorbeeld 2 van de 14 pagina's
Voorbeeld 2 van de 14 pagina's
In winkelwagen
In winkelwagen
Verkoper
Volgen
Victorious23
Ontvangen beoordelingen
Voorbeeld van de inhoud
WGU C955 - Module 6: Correlation &Regression Exam Questions and Answers
A researcher wants to know if there was a relationship between student age
and desire to complete a college degree. To answer this question, the
researcher used a local community college as the sampling frame and then
used stratified sampling to get a sample of students from 18 to 80 years old.
Based on the information given, is there any potential bias in this study?
a Yes, because the sampling frame does not match the intended population
of the question.
b Yes, because the sampling method will not give a representative sample.
c Yes, because a voluntary sample should have been used.
d No, there will likely be no bias in this study. - -Yes, because the sampling
frame does not match the intended population of the question.
-A researcher conducts an observational study and finds a correlation
between managers' income and the number of college credits earned. The
correlation coefficient was r=.85 with a regression equation of
y=515x+12000. What can you say about the relationship between these
variables?
a There is an association between these variables
b There is a causation between these variables.
c There is no relationship between these variables.
d There is not enough information to determine the relationship between the
variables. - -There is an association between these variables
-What technique is used to estimate the profit margin for a production level
of 25 thousand units, if a line of best fit is created to estimate profit margin
for production levels between 20 to 39 thousand units?
a Interpolation
b Linearization
c Extrapolation
d Internalization - -Interpolation
-What is the most appropriate definition of a scatterplot?
a A graph that uses dots to demonstrate relationships between two
categorical variables.
b A graph where lines are shown to represent positive or negative trends.
c A graph where the explanatory and response variables are plotted as
ordered pairs.
, d A graph where a positive causation is always represented with dots
forming a straight line. - -A graph where the explanatory and response
variables are plotted as ordered pairs.
-What does a strong positive correlation between two variables suggest?
a The explanatory variable is increasing and the response variable is
decreasing
b There is an association between the variables
c There is a causation between the variables
d Cannot determine - -There is an association between the variables
-{{ Scatterplot of distance from city center vs. rent. The linear equation for
this scatterplot is y equals negative one hundred five ten thousandths times
x plus ten and three hundred eighty one thousandths. }}
Using the scatterplot Distance from City Center vs. Monthly Rent, how far
can we expect an apartment to be from the city center if the monthly rent is
$ 980 ? Round your answer to the nearest mile.
a Around 54 miles
b Around 55 miles
c Around 56 miles
d Around 57 miles - -Around 55 miles
-Which correlation coefficient suggests the weakest correlation?
a −0.9
b −0.3
c 0.1
d 1 - -0.1
-What does it mean for a result or relationship to be statistically significant?
a The relationship is not caused by mere chance.
b The relationship is caused by chance.
c Your hypothesis test has failed.
d Your significance level is not high enough. - -The relationship is not caused
by mere chance.
-What is the process used to create the equation for the line of best fit?
a Completing the square
b Least squares estimation
c Fitting the line to the curve
d Linear approximation - -Least squares estimation
Dit zijn jouw voordelen als je samenvattingen koopt bij Stuvia:
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
Geen gedoe — betaal gewoon eenmalig met iDeal, Bancontact of creditcard en je bent klaar. Geen abonnement nodig.
Focus op de essentie
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 Victorious23. Stuvia faciliteert de betaling aan de verkoper.
Zit ik meteen vast aan een abonnement?
Nee, je koopt alleen deze samenvatting voor $16.49. Je zit daarna nergens aan vast.
Is Stuvia te vertrouwen?
4,6 sterren op Google & Trustpilot (+1000 reviews)
Afgelopen 30 dagen zijn er 70113 samenvattingen verkocht
Opgericht in 2010, al 15 jaar dé plek om samenvattingen te kopen
Laatst bekeken door jou
Overig ·
Examenverslag Werkproces: Voert coördinerende taken uit (P2-K2-W1)
Tentamen (uitwerkingen) ·
Humber Admissions Test (practice) Questions and Correct Answers (100% Pass)
Voordeelbundel ·
BBH 316 EXAMS BUNDLE with Questions and 100% Correct Verified Answers
Samenvatting ·
samenvatting cursus Acco: locomotorisch stelsel onderste lidmaat
Tentamen (uitwerkingen) ·
ICBC Knowledge Test - TRICKY QUESTIONS Questions and Answers 100% Correct
Samenvatting ·
Samenvatting van het vak: Tools en AI in management en communicatie (MPC)
Tentamen (uitwerkingen) ·
Davita Final exam QUESTIONS AND ANSWERS GRADED A LATEST VESION 2023/202
Scriptie ·
Scriptie hospitality Mood maker, ISBN: 9789024415557, eindcijfer 9
