Given
X = 0.85Y, Y = 0.89X, σ_{x} = 3, r will be
A. | 0.32 |
B. | 0.46 |
C. | 0.87 |
D. | 0.39 |
Option: C Explanation : X = 0.85Y or B_{xy} = 0.85 Y = 0.89X or B_{yx} = 0.89 r = √(B_{xy} x B_{yx}) = √(0.85 x 0.89) = √0.7565 = 0.87 Hence the answer is (c). |
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 |
Option: A Explanation : P_{1} = 35/100 = 0.35 P_{2} = 30/100 = 0.30 n_{1} = 1500, n_{2} = 1000 P_{1} - P_{2} = 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). |
Which one is not the type of utility of information
A. | Form utility |
B. | Time utility |
C. | Place utility |
D. | Product utility |
Option: D Explanation : |
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 |
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). |
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 |
Option: A Explanation : |