Question
For two correlated variables x and y, if
coefficient of correlation between x and y is 0.8014, variance of x and y are 16 and 25 respectively. Then the covariance between x and y is:Solution
Put the given values in formula to get the value of covariance. Cov =(¼)*(1/5)*(0.8014) = 16.028
Read the given statement(s) and conclusions carefully. Assuming that the information given in the statements is true, even if it appears to be at varian...
In a certain language, if '+' means 'subtraction', '×' means 'division', '÷' means 'addition', and '–' means 'multiplication', then find the value o...
Select the option that is related to the fifth letter-cluster in the same way as the second letter-cluster is related to the first letter-cluster and th...
Six letters A, M, R, S, Y and Q are written on different faces of a dice. Two positions of this dice are shown in the figures below. Find the letter on ...
Identify the figure given in the options which when put in place of the question mark (?) will logically complete the series.
If 29 A 17 B 20 = 32 and 33 A 14 B 10 = 29, then 11 A 8 B 3 =?
If 9 March 2007 was Friday, then what was the day of the week on 13 March 2012?
Statements:
• All trojans are fairies.
• No fairy is a flower.
• All viruses are trojans.
Conclusions:
I. N...
‘A = B’ means ‘A is the father of B‘.
‘A $ B’ means ‘A is the sister of B’.
‘A * B’ means ‘A is the mother of B‘.<...
Mohit starts from point Y and drives 6 km towards south. He then takes a left turn, drives 23 km, turns right and drives 27 km. He then takes a right tu...
