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
Number of pairs of observations of x and y series = 10 X series: Arithmetic average = 65Standard deviation = 23.33Y series: Arithmetic average = 66Standard deviation = 14.9Summation of products of corresponding deviation of X and Y series = + 2704 Calculate product moment correlation of x and y series.
  • A
    +0.75
  • B
    0.58
  • C
    0.78
    Correct
  • D
    0.57
2
Calculate spearman’s rank correlation from the following data :
Question 2 figure 1
  • A
    0.13
  • B
    0.14
    Correct
  • C
    0.12
  • D
    +0.25
3
Two judges in a beauty competition rank the twelve entries as follows:
Question 3 figure 1
  • A
    0.65
  • B
    0.55
  • C
    0.35
  • D
    0.45
    Correct
4
Calculate rank correlation coefficient of the following data:
Question 4 figure 1
  • A
    0.76
    Correct
  • B
    0.75
  • C
    0.74
  • D
    0.77
5
Calculate the correlation coefficient of the marks obtained by 12 students in mathematics and statistics and interpret it
Question 5 figure 1
  • A
    0.78
    Correct
  • B
    +0.75
  • C
    0.77
  • D
    0.76
6
In a marketing survey the price of tea and coffee in a town based on quality was found as shown below. Could you find any relation between and tea and coffee price.
Question 6 figure 1
  • A
    0.86
  • B
    0.89
    Correct
  • C
    0.87
  • D
    0.85
7
In an evaluation of answer script the following marks are awarded by the examiners.
Question 7 figure 1
  • A
    0.578
  • B
    0.645
  • C
    0.643
    Correct
  • D
    0.543
8
For 10 observations x = 130; y = 220; x2 = 2290; x = 130, y = 220, x2 = 2290, y2 = 5510, xy =3467, Find r
  • A
    0.7984
  • B
    0.9574
    Correct
  • C
    0.5947
  • D
    0.8475
9
Cov (x,y) = 18.6; var(x) = 20.2; var(y) = 23.7. Find ‘r’.
  • A
    0.65
  • B
    0.85
    Correct
  • C
    0.75
  • D
    0.45
10
Given that r = 0.42 cov(x,y) = 10.5 v(x) = 16; Find the standard deviation of y.
  • A
    5.23
  • B
    6.25
    Correct
  • C
    4.21
  • D
    3.42
11
Rank correlation coefficient r = 0.8., D2 = 33. Find ‘ n’ .
  • A
    12
  • B
    11
  • C
    13
  • D
    10.0
    Correct
12
Compute the coefficient of correlation of the following score of A and B
Question 12 figure 1
  • A
    0.52
  • B
    0.58
    Correct
  • C
    0.57
  • D
    0.54
13
Calculate coefficient of Correlation between price and supply. Interpret the value of correlation coefficient.
Question 13 figure 1
  • A
    0.95
  • B
    0.96
  • C
    0.98
    Correct
  • D
    0.92
14
Find out Karl Pearson’s coefficient of correlation in the following series relating to prices and supply of a commodity.
Question 14 figure 1
  • A
    0.94
  • B
    0.92
  • C
    0.95
  • D
    0.96
    Correct
15
If \({{\text{r}}_{{\text{xy}}}} = - 0.{\text{85}}\) then \({{\text{r}}_{{\text{yx}}}} = \)?
  • A
    -0.85
    Correct
  • B
    0.85
  • C
    0.45
  • D
    -0.54