**The number of elements in an m*n matrix is ____. **

a. mn.

b. m+n.

c. m/n.

d. mn.

Answer: A

The number of elements in a square matrix of order n is _____.

a. n3 .

b. n4.

c. n .

d. n2.

Answer: D

**The determinant value of the matrix**

**0 c b c0a ba0 is ______________.**

a. 0.

b. 2abc.

c. abc.

d. –abc.

Answer: B

**The solution** **x 2**

**1 1 = 0 is_____.**

a. 0.

b. 1.

c. -1.

d. 2.

Answer: D

**The order of the matrix B= [1 2 5 7] is ________. **

a. 1*4.

b. 4*1.

c. 2*1.

d. 1*1.

Answer: A

**Thetypeofthematrix 2 0 0v0 3 0 is __________.**

a. scalar matrix.

b. diagonal matrix.

c. unit matrix.

d. null matrix.

Answer: B

**Theminorof2in**

a. 0.

b. 1.

c. -3.

d. 2.

Answer: A

**The rank of the matrix** **2 -3**

**6 0 is_____.**

a. 4.

b. 1.

c. 3.

d. 2.

Answer: B

**Every ____ matrix satisfies its own characteristic equation.**

a. scalar matrix.

b. diagonal matrix.

c. unit matrix.

d. square matrix.

Answer: D

**Matrix A is of order 2*3 and B is of order 3*2 then BA is of order____. **

a. 3*2.

b. 2*3.

c. 2*2 .

d. 3*3.

Answer: D

**The trace of a _____ matrix is the sum of its diagonal elements.**

a. scalar matrix.

b. diagonal matrix.

c. unit matrix.

d. square matrix.

Answer: D

**The error in the trapezoidal rule is of the order_______.**

a. h.

b. h2.

c. h3.

d. h4.

Answer: B

**The error in the Simpson’s rule is of the order_______.**

a. h.

b. h2.

c. h3 .

d. h4.

Answer: D

**__________ method is used for finding the dominant Eigen-value of a matrix. **

a. Gauss Elimination Method.

b. Gauss Jordan Method.

c. Newton Raphson Method.

d. Power method.

Answer: D

**Simpson’s 1/3rd rule of integration is exact for all polynomials of degree not**

**exceeding _________. **

a. 4.

b. 1.

c. 3.

d. 2.

Answer: D

**Simpson’s 3/8th rule is applicable only when_____. **

a. n is multiple of 3.

b. n is multiple of 6.

c. n is multiple of 8.

d. n is multiple of 24.

Answer: A

**In Simpson’s 1/3rd rule the number of intervals must be _____.**

a. multiple of 3.

b. multiple of 6.

c. odd.

d. even.

Answer: D

**The method used to solve a system of simultaneous linear equations are known**

**as_____ method.**

a. direct.

b. indirect.

c. iterative.

d. interpolation.

Answer: A

**The modification of Gauss elimination method is______.**

a. Gauss method.

b. Gauss Jacobi.

c. Gauss Jordan Method.

d. Gauss Siedel Method.

Answer: C

**Gauss elimination and Gauss Jordan methods are _______.**

a. direct.

b. indirect.

c. iterative.

d. interpolation.

Answer: A

**_____ is used to denote the process of finding the values inside the interval(X0, Xn).**

a. Interpolation.

b. Extrapolation.

c. Iterative.

d. Polynomial equation.

Answer: A

**The forward difference operator denoted by the symbol is__________.**

a. ∆

b. Ω .

c. ∂ .

d. ∞.

Answer: A

**LaGrange’s interpolation is used to interpolate the values of ____ intervals.**

a. equal.

b. unequal.

c. open.

d. closed.

Answer: B

**In Newton’s forward interpolation formula, the first and second terms will give the** **_____ interpolation.**

a. linear.

b. parabolic.

c. hyperbolic.

d. non-linear.

Answer: A

**The Runge-kutta method of second order is nothing but ____.**

a. Euler Method.

b. Taylor method

c. modified Euler method

d. improved Euler method.

Answer: C

**The harmonic mean is the reciprocal of the ______ of the values.**

a. mean.

b. median.

c. mode.

d. geometric mean.

Answer: A

**Which average is affected most by extreme observations**

a. mean.

b. median.

c. mode.

d. geometric mean.

Answer: D

**Which of the following is the most unstable average**

a. mean.

b. median.

c. mode.

d. geometric mean.

Answer: C

**For dealing with qualitative data the best average is______.**

a. mean.

b. median.

c. harmonic mean.

d. geometric mean.

Answer: B

**In a moderately asymmetrical distribution is______.**

a. AM>GM>HM.

b. AM<GMGM>AM .

d. AM≥GM≥HM.

Answer: D

**Suppose a teacher records the following scores for a test 87, 42, 55,87,99,98,87,55,87**

**the mode is ____.**

a. 99.

b. 98.

c. 42.

d. 87.

Answer: D

**The empirical relation between the mode, median, and mode is____.**

a. mean=mode=median.

b. mode=3median-2mean.

c. mean=3mode-2median.

d. mean=median-3mean.

Answer: B

**The positive square root of the variance____.**

a. mean.

b. range.

c. standard deviation.

d. median.

Answer: C

**Sum of deviations about mean is____.**

a. 0.

b. 1 .

c. maximum.

d. minimum.

Answer: A

**Which is the simplest method of measures of dispersion**

a. mean.

b. range.

c. standard deviation.

d. variance.

Answer: B

**Correlation coefficient lies between_____.**

a. 0 & 1.

b. 0 & 2.

c. -1&1.

d. 1 & 2.

Answer: C

**If one of the rank correlations is greater than unity, then the other must be _____.**

a. less than unity.

b. greater than unity.

c. zero.

d. one.

Answer: A

**Regression coefficient is independent of ______.**

a. origin.

b. scale.

c. origin & scale.

d. neither origin nor scale.

Answer: A

**The geometric mean of the two rank correlation b(xy) & b(yx) is equal to____.**

a. r.

b. r2.

c. r3.

d. r4.

Answer: B

**A correlation coefficient is independent of______.**

a. origin.

b. scale.

c. origin & scale.

d. neither origin nor scale.

Answer: C

**Which of the following is true**

a.r= b(xy)b(yx).

b. r2= b(xy)b( yx) .

c. 1/r= b(xy)b(yx) .

d. r=[b(xy)b(yx)]=1.

Answer: A

**A correlation is perfect and positive, if r=___________.**

a. -1.

b. 0.

c. +2.

d. +1.

Answer: D

**The product moment correlation coefficient is obtained by the formula____.**

a.r= XY.

xy

b. r = XY .

N X Y

c.r= XY .

NX

d.r= XY .

N Y

Answer: B

**Both the regression coefficient cannot exceed____.**

a. one.

b. -1.

c. 0.

d. maximum.

Answer: A

**The average relationship between two variable is____.**

a. correlation.

b. rank correlation.

c. regression.

d. both correlation and regression.

Answer: C

**The relationship between 3 or more variables is studied with the help of ________** **correlation.**

a. simple.

b. multiple.

c. rank.

d. partial.

Answer: B

**The ________ is the reciprocal of arithmetic mean of the values.**

a. median.

b. mode.

c. geometric mean.

d. harmonic mean.

Answer: D

**Newton forward interpolation is used for______ intervals.**

a. equal.

b. unequal.

c. open.

d. closed.

Answer: A

**Given (x0, y0) and (x1, y1) the LaGrange’s interpolation formula is ______.**

a.y=xx1 y0+xx0 y1.

x0 x1 x1 x0

b.x= xx1 y0+ xx0 y1.

x0 x1

c. y = x x1

x1 x0

x0+ x x0 x1.

x0 x1

x1 x0

d. y = y0 +p∆ y0+p2∆2 y0.

Answer: A