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
Following are the elements of correlation except
  • A
    There should be three or more variables
  • B
    There should be only curvilinear relations among variables
    Correct
  • C
    The change in the value of one affects another
  • D
    There should be relationship among them
2
Two variables are said to be positively correlated when with the _____ in the value of one variable the value of another also _____
  • A
    Rise , Fall
  • B
    Rise , Rise
  • C
    Fall, Rise
  • D
    Fall , fall
    Correct
3
If with the fall in the value of one variable the value of another variable rises in the same proportion then it is said to be
  • A
    Both
  • B
    Positively correlated
  • C
    None
  • D
    Negatively correlated
    Correct
4
If the coefficient correlation exactly equals to -1 then it will be effect
  • A
    Simple correlation
  • B
    Multiple correlation
  • C
    Positive correlation
  • D
    Negative correlation
    Correct
5
When the correlation is only studied between two variables it is called
  • A
    Positive correlation
  • B
    Negative correlation
  • C
    Multiple correlation
  • D
    Simple correlation
    Correct
6
Multiple correlation is
  • A
    When the correlation is studied between three or more variables
    Correct
  • B
    When the correlation is only studied between four variables
  • C
    When the correlation is only studied between two variables
  • D
    When the correlation is only studied between three variables
7
If the ratio of change between the two variables is a constant then there will be
  • A
    Negative correlation
  • B
    Linear correlation
    Correct
  • C
    Positive correlation
  • D
    Non-linear correlation
8
Correlation coefficient is denoted by
  • A
    co
  • B
    r
    Correct
  • C
    l
  • D
    c
9
Who was a great biometrician and statistician
  • A
    Karl Pearson
    Correct
  • B
    Kal Pearson
  • C
    Kally Pearson
  • D
    Kaerl Pearson
10
When r = 1, there is perfect
  • A
    perfect -ve relationship between the variables
  • B
    no relationship between the variables
  • C
    None
  • D
    perfect +ve relationship between the variables
    Correct
11
If r is near to zero (i.e.) 0.1,-0.1, (or) 0.2 there is
  • A
    Both
  • B
    less degree of correlation
    Correct
  • C
    None
  • D
    high degree of correlation
12
Coefficient of correlation is also known as product moment correlation.
  • A
    None
  • B
    Both
  • C
    Karl Pearson’s coefficient of correlation .
    Correct
  • D
    Spearman’s rank correlation.
13
Formula for calculating correlation from the assumed mean method is
  • A
    \(r = \frac{{\sum {dx.dy - \frac{{\left( {\sum {dx} } \right)\left( {\sum {dy} } \right)}}{N}} }}{{\sqrt {\sum {d{x^2} - \frac{{{{\left( {\sum {dx} } \right)}^2}}}{N}} } \sqrt {\sum {d{y^2} - \frac{{{{\left( {\sum {dy} } \right)}^2}}}{N}} } }}\)
    Correct
  • B
    None
  • C
    \(r = \frac{{N\sum {dx.dy - \left( {\sum {dx} } \right)\left( {\sum {dy} } \right)} }}{{\sqrt {\sum {d{x^2} - \frac{{{{\left( {\sum {dx} } \right)}^2}}}{N}} } \sqrt {\sum {d{y^2} - \frac{{{{\left( {\sum {dy} } \right)}^2}}}{N}} } }}\)
  • D
    Both
14
What is the range of simple correlation coefficient?
  • A
    1< r < 1
    Correct
  • B
    1< r < 1
  • C
    1< r > 1
  • D
    1> r > 1
15
Which method of measuring correlation measures any type of relationship?
  • A
    None
  • B
    Spearman’s rank correlation.
  • C
    Both
  • D
    Karl Pearson’s coefficient of correlation
    Correct