# Statistics and methodology - Statistics and Methodology Multiple Choice Questions

56:

Given

X = 0.85Y, Y = 0.89X, σx = 3, r will be

 A. 0.32 B. 0.46 C. 0.87 D. 0.39 Answer Report Discuss Option: C Explanation : X = 0.85Y or Bxy = 0.85 Y = 0.89X or Byx = 0.89 r = √(Bxy x Byx) = √(0.85 x 0.89) = √0.7565 = 0.87 Hence the answer is (c). Click on Discuss to view users comments. Write your comments here:
57:

In two large populations there are 35 and 30 per cent of fair haired people. Will the difference disappear at 5% level of significance, if samples of 1500 and 1000 are respectively taken from the two populations?

 A. Difference is significant B. Significant with condition C. Difference is not significant D. Significant with error Answer Report Discuss Option: A Explanation : P1 = 35/100 = 0.35 P2 = 30/100 = 0.30 n1 = 1500, n2 = 1000 P1 - P2 = 0.35 - 0.30 = 0.05 The standard error of difference is – Hence the difference is significant at 5% level of significance. It is unlikely that the difference will disappear. Answer is (a). Click on Discuss to view users comments. Write your comments here:
58:

Which one is not the type of utility of information

 A. Form utility B. Time utility C. Place utility D. Product utility Answer Report Discuss Option: D Explanation : Click on Discuss to view users comments. Write your comments here:
59:

Three helicopter crewmen are needed in an emergency. There are six crewmen on duty. In how many ways could three of them be chosen to fly the machine?

 A. 20 B. 17 C. 30 D. 15 Answer Report Discuss Option: A Explanation : n = 6, r = 3 Combinations = n!/(r!(n - r)!) = 6!/(3!(6 - 3)!) = (6 x 5 x 4)/(3 x 2 x 1) = 20 Hence the answer is (a). Click on Discuss to view users comments. Write your comments here:
60:

If the decision process are ______, the information technology choice will weigh in favour of those systems, where the acquisition, processing, analysis and decision making will be at distributed nodel points.

 A. Decentralised B. Managers process C. Business operation D. Centralised Answer Report Discuss Option: A Explanation : Click on Discuss to view users comments. Write your comments here: