Business Statistics And Research Methods - Study Mode
[#496] Assertion (A) Standard deviation is independent of change of origin. Reason (R) The value of standard deviation remains the same, if in a series each the observation is increased or decreased by a constant quantity.
Correct Answer
(A) Both (A) and (R) are true
[#497] An investigator collects data himself or through his agents by contacting and interviewing students and the same data has been collected by the student union and the investigator obtains the data from the students union officer.
Correct Answer
(A) Data collected is regarded as primary and secondary data respectively
[#498] In this the value of rank correlation coefficient will be Rank X 5 3 4 8 2 1 7 10 6 9 Rank Y 3 7 5 9 2 4 1 10 8 6
Correct Answer
(A) +0.52
[#499] The mean of 15 numbers was found to be 15. If two numbers 18 and 12 are taken out, then the mean of remaining numbers will be
Correct Answer
(C) 15
[#500] To calculate the arithmetic mean, there should be class differences
Correct Answer
(D) All the above