Company: Infoedge_IITM
Difficulty: medium
Which of the following is TRUE for the eigenvalues of a n x n matrix? product of the eigenvalues is equal to the determinant of the matrix sum of the eigen values is equal to the trace of the matrix if any of the eigen values is 0, then the matrix is not invertible All of the above Why is it difficult to compute meaningful statistical measures on full population data? Due to unavailability of data Due to Outliers Due to computation resources Both 1 and 2 For any Normal distribution Z, which of the following is always TRUE? Coefficient of skewness (E(Z^3))=0 E(Z)=0, E(Z^2)=Var(Z)=1 Kurtosis (E(Z^4))=4 Its density function is symmetric about its mean. A biased coin with P(Heads) = 0.8 is tossed until first tail appears. What is the probability that the coin was tossed exactly thrice? 0.8*0.8*0.2 0.8*0.2*0.2 0.2*0.2*0.8 0.8*0.8*0.8 From a population, we have selected 49 samples. If the distribution of sample means has an expected value of 32 and standard deviation of 5, what is the mean a