correlation and regression

Question 1

It measures the relationship between variables.

Answer 1

Correlation

Question 2

It predicts the outcome or effect of variable to another variable.

Answer 2

Regression

Question 3

It is a statistical tool to measure the association between variables

Answer 3

Correlation

Question 4

It is concerned with the relationship in the changes and movements of two variables.

Answer 4

Correlation

Question 5

It measures the extend of relationship between variables.

Answer 5

Correlation

Question 6

What are the two types of correlation tests?

Answer 6

1.Pearson - Product Moment Correlation
2.Spearman Rho Correlation

Question 7

It is a type of data focused on descriptions or used to label variables without any order or quantitative value.

Answer 7

Nominal data

Question 8

It is a type of data where data can be put in order or when data have natural ordering.

Answer 8

Ordinal data

Question 8

These are data in the form of fractional numbers or decimals.

Answer 8

Continuous

Question 9

These are data that contain the values that fall under integers or whole numbers.

Answer 9

Discrete

Question 10

We can only use this correlation test strictly for discrete and continuous data.

Answer 10

Pearson-product moment correlation

Question 11

In this correlation test, nominal and ordinal data are accepted.

Answer 11

Spearman Rho Correlation

Question 12

It measures the nature and strength between two variables of the quantitative type.

Answer 12

Pearson’s Correlation / Product Moment Correlation Coefficient

Question 13

It is denoted by r.

Answer 13

Pearson’s Correlation / Product Moment Correlation Coefficient

Question 13

It measures the degree of linear association.

Answer 13

Pearson’s Correlation / Product Moment Correlation Coefficient

Question 14

What is the range of rho when using Pearson’s Correlation?

Answer 14

ranges from +1.0 (positive) to -1.0 (negative)

Question 15

What does the sign of r denotes in Pearson’s Correlation?

Answer 15

nature of association

Question 16

It is correlation with direct variable.

Answer 16

Positive Correlation

Question 16

What does the value of r denotes in Pearson’s Correlation?

Answer 16

strength of association

Question 17

In this correlation, when x increases, y also increases.

Answer 17

Positive correlation

Question 18

In this correlation, when the x increases, the y decreases.

Answer 18

Negative Correlation

Question 19

What value of r gives a perfect positive correlation?

Answer 19

1

Question 20

What is the value of a perfect negative correlation?

Answer 20

-1

Question 20

It is a correlation with indirect variable.

Answer 20

Negative Correlation

Question 21

In this correlation, there is an absence of any systematic tendency.

Answer 21

Zero Correlation

Question 22

It is a non-parametric measure of correlation.

Answer 22

Spearman Rank Correlation Coefficient

Question 23

How is Spearman Rank Correlation Coefficient denoted?

Answer 23

rsub(s)

Question 24

It is a technique concerned with predicting some variables by knowing others.

Answer 24

Regression

Question 25

It tells you how values in y changes as a function of changes in values of x.

Answer 25

Regression

Question 26

It used for prediction.

Answer 26

Regression

Question 27

True or False. You can predict something even though variables have no correlation.

Answer 27

False

Question 28

What is line of best fit in linear regression?

Answer 28

y = mx + b