Correlation CBSE Questions & Answers

Correlation

This is Economics Class 11 Correlation CBSE Questions & Answers. There are 15 questions in this test with each question having around four answer choices.

Questions & Answers

1
If cov(x,y) = 0 then
  • A
    x and y are linearly related
  • B
    x and y are uncorrelated
    Correct
  • C
    x and y are correlated
  • D
    none
2
If D2 = 0 rank correlation is
  • A
    0.5
  • B
    0
  • C
    1.0
    Correct
  • D
    -1
3
Correlation coefficient is independent of change of
  • A
    Scale
  • B
    Origin and Scale
    Correct
  • C
    None
  • D
    Origin
4
Rank Correlation was found by
  • A
    Galton
  • B
    Fisher
  • C
    Spearman
    Correct
  • D
    Pearson
5
The coefficient of correlation
  • A
    Cannot be positive
  • B
    Cannot be negative
  • C
    Can either be positive or negative
    Correct
  • D
    Always positive
6
Correlation refers to
  • A
    The association between two variables
    Correct
  • B
    The causal relationship between two variables
  • C
    None
  • D
    The proportion of variance that two variables share.
7
If two variables are highly correlated, what do you know?
  • A
    That high values on one variable lead to high values on the other variable
  • B
    That there are no other variables responsible for the relationship
  • C
    That changes in one variable are accompanied by predictable changes in the other
    Correct
  • D
    That they always go together
8
If paired scores occupy the same positions within their own distributions (high with high and low with low)
  • A
    Pearson r will be close to 0.
  • B
    Pearson r will be low and negative.
  • C
    Pearson r will be high and positive.
    Correct
  • D
    Standard deviation will be high.
9
Which of the following indicates the strongest relationship?
  • A
    \({{\text{r}}^{\text{2}}} = {\text{ }}.{\text{2}}\)
  • B
    r = .5
  • C
    r = - .6
    Correct
  • D
    r = .08
10
A researcher finds a correlation of .40 between personal income and the number of years of college completed. Based upon this finding he can conclude that
  • A
    A person who attended four years of college will have an annual income of $40,000
  • B
    None
  • C
    More years of education are associated with higher income.
    Correct
  • D
    Personal income is a positively skewed variable
11
Which of the following may have an adverse effect on a correlation coefficient?
  • A
    The scores on one variable have larger numbers than the other variable
  • B
    Restricting the range of possible scores
    Correct
  • C
    Too many people in your experiment
  • D
    A negative relationship between your X and Y variables
12
Which of the following is not a use for r?
  • A
    Validity
  • B
    Power analysis
    Correct
  • C
    Correlation
  • D
    Reliability
13
If two variables oppose each other then the correlation will be
  • A
    No Correlation
  • B
    Positive Correlation
  • C
    Negative Correlation
    Correct
  • D
    Perfect Correlation
14
A perfect negative correlation is signified by
  • A
    0
  • B
    2
  • C
    -1.0
    Correct
  • D
    1
15
The Spearman correlation is used with
  • A
    Nominal data
  • B
    Ratio data
  • C
    Interval data
  • D
    Ordinal data
    Correct