Company: Infoedge_Data_Science_8nov
Difficulty: medium
A factory uses two machines, A and B, to produce light bulbs. Machine A produces 60% of the bulbs, and Machine B produces 40%. Historically, 2% of the bulbs from Machine A are defective, and 4% from Machine B are defective. If a randomly selected bulb from the factory is found to be defective, what is the probability it was produced by Machine B? 0.25 0.42 0.55 0.625 Let A be an m X n real matrix. Which of the following is true if all eigenvalues of A are positive real numbers? A is diagonalisable and invertible A must be a symmetric matrix A has full rank, but may not be diagonalizable Determinant of A is zero Which scenario would require the use of a chi-square test? Testing the equality of means. Testing the independence between two categorical variables. Testing correlation between two continuous variables. None of the Above A biased coin is tossed 4 times. The probability of getting exactly 2 heads is given by which expression, where p is the probability of a head? 4p²(1-p)² 6p²(1