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What is the (ir)relevance of studying dead Western scholars as part of the SA sociology syllabus?
Critically discuss the impact of the enlightenment era on european ideas of race and images of Africa with reference to the philosophies of at least enlightenment thinkers
Write any 10 principles of data visualisation.
(a) If X1, X2, X3, ..., Xn and Y1, Y2, Y3, ..., Yn are the variate values of two variables X and Y, and their geometric means are G1and G2, respectively, then geometric mean of (xj/yi); i = 1, 2, ... n will be (G1/G2).
(b) If each value of X is divided by 2 and of Y is multiplied by 2, then b'YX will be same as b.
(a) The mean and standard deviation of a set of values are 25 and 5, respectively. If a constant value 5 is added to each value, the coefficient of variation of the new set of values is equal to 10%.
(b) If (A) = 90, (AB) = 40, N = 150 and (β) = 80 then (αβ) = 30.
The numbers 3.2, 5.8, 7.9 and 4.5 have frequencies Y, (Y + 2), (Y - 3) and (Y + 6), respectively. If the arithmetic mean is 4.876, find the value of Y and write the whole series.
The value of Spearman's rank correlation coefficient of a set of non-repeating values was found to be 2/3. The sum of the squares of difference between the corresponding ranks was 55. Find the number of pairs.
Given the following data: r12 = 0' 8 , r13 = 0.6 and r23= 0.4 then find
(i) r12.3
(ii) r13.2
(iii) r23.1
(iv) R1.23
In a statistical study relating to the prices (in T) of two shares, X and Y, the following two regression lines were found as 8X - 10Y + 70 = 0 and 20X - 9Y - 65 = 0. The standard deviation of X = 3, then find (i) the values of X and Y, (ii) r(X, Y), and (iii) standard deviation of Y.
Can vaccination be regarded as a preventive measure for smallpox from the given data:
(i) Of 1482 persons in a locality exposed to smallpox, 368 in all were attacked, and
(ii) Of 1482 persons, 343 had been vaccinated and of these only 35 were attacked.
#339914 on Dec 2023