For random variable X, use the following statistics to calculate its coefficient of skewness based on central moments.
E(X) = 3.940
E(X2) = 21.466
skew(X) = E[(X - )3] = 6.008
Answer : C
Determinewhich of the following is the Maclaurin expansion (up to the second order term) of: e2x
Answer : D
In a small island nation, local sea vessels are identified using "a letter and 4 digits" classification system. The "letter" can be any of the 26 letters in the English alphabet, A to Z, while the "digit" can be any number from 0 to 9. E.g: Z9835.
Calculate the probability of a sea vessel having an identification ending in "007".
Answer : A
The first term of an arithmetic sequence is 12 and the ninth term is 68.
Calculate the sum of the first 18 terms.
Answer : B
A and B are the stationary points of f(x).
f(x) = 2x3- x2- 8x + 8
A = (-1,13)
B = (4/3,8/27)
Determine whether each stationary point is a maximum, minimum or point of inflexion.
Answer : A
A recurrence relation is given by: Un = 2Un - 1 + 3
If U0 = 0, calculate U2 =
Answer : B
A geometric series is given by
Identify the values of x for which the series converges.
Answer : B