Given
Σdxdy = 186, Σdx = 11, Σdy = 7, N = 10, Σd2x = 215, Σd2y = 163.
Find out correlation
A. | + 0.72 |
B. | + 0.99 |
C. | + 0.96 |
D. | |
Option: B Explanation :
Hence the answers (b). Click on Discuss to view users comments. |
A machine on the average produces 5% defective articles. What are the mean and standard deviation in sets of 100 articles?
A. | 5.3 |
B. | 3.4 |
C. | 2.2 |
D. | 3.3 |
Option: C Explanation : Mean = np = 100 x 0.05 = 5 σ = √(npq) = √(0.05 x 0.95 x 100) = 2.2 Hence the answer is (c). Click on Discuss to view users comments. |
If the proportion of defective in a bulk is 4%, find the probability of not more than 2 defectives in a sample of 10, it is known that e-4 = 6703
A. | 99.2% |
B. | 3.06% |
C. | 9.36% |
D. | 4.02% |
Option: A Explanation :
Probability of not more than 2 defectives = 0.6703 + 0.26812 + 0.053624 = 0.992044 x 100 = 99.2% Hence the answer is (a). Click on Discuss to view users comments. |