Recent questions in Correlation

Inferential StatisticsAnswered question

adwelitiovb 2023-02-20

Which of the following statements is not correct for the relation R defined by aRb, if and only if b lives within one kilometre from a?

A) R is reflexive

B) R is symmetric

C) R is not anti-symmetric

D) None of the above

A) R is reflexive

B) R is symmetric

C) R is not anti-symmetric

D) None of the above

Inferential StatisticsAnswered question

Kierra Griffith 2022-11-22

What is the relationship between the correlation of two variables and their covariance?

Inferential StatisticsAnswered question

apopiw83 2022-11-20

Can you determine the correlation coefficient from the coefficient of determination?

Inferential StatisticsAnswered question

Kayley Dickson 2022-11-10

Show that if ${x}_{t+l}=A{x}_{t}$ , then $\rho (l)=1$ if $A>0$, and $\rho (l)=-1$ if $A<0$.

Inferential StatisticsAnswered question

Jadon Camacho 2022-11-07

Can you determine the coefficient of determination from the correlation coefficient?

Inferential StatisticsAnswered question

kemecryncqe9 2022-11-04

What does a correlation coefficient of -1, 0, and 1 mean?

Inferential StatisticsAnswered question

Owen Mathis 2022-11-04

Can t-test statistics be a negative number?

Inferential StatisticsAnswered question

Nico Patterson 2022-11-03

$Y=AX+B{X}^{3}$ . Compute $Var(Y|X=x)X$ has distribution $N(1,1)$ and $A\text{}\mathrm{}\text{}B$ both have distribution $U(-1,1)$ .

Inferential StatisticsAnswered question

Elliana Molina 2022-11-02

How can adjusted r squared be negative?

Inferential StatisticsAnswered question

gasavasiv 2022-11-01

If two variables have a negative correlation, can they have a positive covariance?

Inferential StatisticsAnswered question

Payton George 2022-10-30

How can a t-statistic be used to determine statistical significance?

Inferential StatisticsAnswered question

racmanovcf 2022-10-26

How does r squared related to standard deviation?

Inferential StatisticsAnswered question

limfne2c 2022-10-23

How do you calculate the t-score of the slope of a time series regression?

Inferential StatisticsAnswered question

garnirativ8 2022-09-30

Let us define the correlation coefficient as $\rho (X,Y)=\frac{Cov(X,Y)}{\sqrt{Var(X)Var(Y)}}$ .

Are the following statements true or false?

If $\rho (X,Y)=\rho (Y,Z)=0$ then $\rho (X,Z)=0$

If $\rho (X,Y)>\rho (Y,Z)>0$ then $\rho (X,Z)>0$

If $\rho (X,Y)<\rho (Y,Z)<0$ then $\rho (X,Z)<0$

I think they are false, but I can't find counterexamples. Could you help me?

Are the following statements true or false?

If $\rho (X,Y)=\rho (Y,Z)=0$ then $\rho (X,Z)=0$

If $\rho (X,Y)>\rho (Y,Z)>0$ then $\rho (X,Z)>0$

If $\rho (X,Y)<\rho (Y,Z)<0$ then $\rho (X,Z)<0$

I think they are false, but I can't find counterexamples. Could you help me?

Inferential StatisticsAnswered question

eukrasicx 2022-09-29

Proof that given 2 variables X and Y with correlation ${\rho}_{X,Y}$ and given $U=a+bX$ and $V=c+dY$ then ${\rho}_{X,Y}={\rho}_{U,V}$ if $bd>0$

Inferential StatisticsAnswered question

Aidyn Crosby 2022-09-29

A and B have negative correlation, so -A and -B have positive?

When you are dealing with statistics and probability, inferential statistical data will be one of those complex tasks where you will use the correlation coefficient calculator for your management data or the lab experiments. As you can learn from the questions that are being asked when working on correlation tasks, the range of practical applications is almost endless. See various correlation problems examples below and take a step-by-step approach as it will help you to understand the probability aspect and adjust the variables accordingly. The most important is to provide verbal explanations for your sample groups and explain your methods.