Question

Compute the coefficient of correlation of the following score of A and B
A 5 10 5 11 12 4 3 2 7 1
B 1 6 2 8 5 1 4 6 5 2
a. 0.58
b. 0.54
c. 0.56
d. 0.52
Q2. When X increases, Y increases and their ratio is 1 : 2 throughout. What kind of correlation exist between X and Y?
a. Positive
b. Negative
c. Positive Linear
d. Negative Linear
Q3. If there is a perfect disagreement between the marks in geography and statistics ,then what would be the value of rank correlation coefficient?

a. 1
b. 0
c. - 1
d. 5
Q4. Correlation coefficient is of the units of measurement.

a. Independent
b. Dependent
c. Both (a) and (b)
d. None of these
Q5. The relationship between three or more variables is studied with the help of
correlation

a. Multiple
b. Single
c. Double
d. None
Q6. When r = 1, all the points in a scatter diagram would lie:

a. On a straight line directed from lower left to upper right
b. On a straight line
c. On a straight line directed from upper left to lower right
d. Both (a) and (b)
Q7. Number of pairs of observations of x and y series = 10 X series: Arithmetic average = 65
Standard deviation = 23.33
Y series: Arithmetic average = 66 Standard deviation = 14.9
Summation of products of corresponding deviation of X and Y series = + 2704 Calculate product moment correlation of x and y series.

a. 0.78
b. +0.75
c. 0.58
d. 0.57
Q8. The lowest strength of association is reflected by which of the following correlation coefficients?

a. 0.95
b. -0.60
c. 0.35
d. 0.29
r = .8 ,sum of D2 = 33 find N
Q9. Cov (x,y) = 18.6; var(x) = 20.2; var(y) = 23.7. Find ‘r’. a. 0.85
b. 0.75
c. 0.65
d. 0.45
Q10. The range of simple correlation coefficient is:

a. 0 to infinity
b. Minus one to plus one
c. Minus infinity to infinity
d. 0 to plus one
Q11. When we want to classify the data given in numerical terms, which method of classification of data is used?

a. Qualitative classification
b. Quantitative classification
c. Chronological classification
d. Conditional classification
Q12. Range of a frequency distribution is equal to

a. Largest value - Smallest value
b. Number of classes × Class Interval (when class intervals are the same)
c. Largest value - Smallest value and Number of classes × Class Interval (when class intervals are the same)
d. None of these

Q13. Tally marks determine:

a. Class limit
b. Class boundary
c. Class width
d. Class frequency

Answer 1

Answer:

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Explanation:

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