What is the dimension of a matrix?

• A) The number of rows in the matrix.
• B) The number of non-zero elements in the matrix.
• C) The number of rows by the number of columns in the matrix.
• D) The number of columns in the matrix.

If $A = \left[ {\begin{array}{*{20}{c}} \begin{gathered} 2 \hfill \\ 0 \hfill \\ \end{gathered} &\begin{gathered} 2 \hfill \\ 0 \hfill \\ \end{gathered} &\begin{gathered} 2 \hfill \\ 0 \hfill \\ \end{gathered} \end{array}} \right]$ and $B = \left[ {\begin{array}{*{20}{c}} 1 \\ 1 \\ 1 \end{array}} \right]$ then the matrix $AB$ wil be ______________.

• A) \[\left[ {\begin{array}{*{20}{c}} 2&2&2 \end{array}} \right]\]
• B) $\left[ {\begin{array}{*{20}{c}} 6 \\ 0 \end{array}} \right]$
• C) $\left[ 2 \right]$
• D) $\left[ {\begin{array}{*{20}{c}} \begin{gathered} 2 \hfill \\ 0 \hfill \\ \end{gathered} &\begin{gathered} 2 \hfill \\ 0 \hfill \\ \end{gathered} &\begin{gathered} 2 \hfill \\ 0 \hfill \\ \end{gathered} \end{array}} \right]$

Two matrices A and B may be added together provided that they have the __________ number of rows and columns.

• A) different
• B) same
• C)
• D)

${\text{If }}i = 5\% {\text{ and }}n = 10{\text{, then the accumulation factor AF is equal to __________}}{\text{.}}$

• A) $11.58$
• B) $12.58$
• C) $12.85$
• D) $11.85$

Matrix multiplication is only possible if the row matrix and the column matrix have the __________ number of elements.

• A) same
• B) different
• C)
• D)

Two matrices $A$ and $B$ are said to be confirmable for multiplication if __________.

• A) the number of columns in matrix $A$ is equal to the number of rows in matrix $B$
• B) the number of rows in matrix $A$ is equal to the number of rows in matrix $B$
• C) the number of rows in matrix $A$ is equal to the number of columns in matrix $B$
• D) the number of columns in matrix $A$ is equal to the number of columns in matrix $B$

a (A + B) = ___________

• A) a A + a B
• B) a A + B
• C) A + B
• D) A + a B

What is the dimension of a matrix?

• A) The number of rows by the number of columns in the matrix.
• B) The number of non-zero elements in the matrix.
• C) The number of rows in the matrix.
• D) The number of columns in the matrix.

\({\rm{If}}\,{\rm{ }}A = \left[ {\begin{array}{*{20}{c}} 2\\ 3\\ 0 \end{array}} \right]{\rm{ and }}B = \left[ {\begin{array}{*{20}{c}} { - 1}&0&6 \end{array}} \right]{\rm{ then}}\;AB = \_\_\_\_\_\_\_\_\_\_.\)

• A) \(\left[ {\begin{array}{*{20}{c}} 1&3&6 \end{array}} \right]\)
• B) \(\left[ { - 2 } \right]\)
• C) \(\left[ {\begin{array}{*{20}{c}} 1\\ 3\\ 6 \end{array}} \right]\)
• D) \(\left[ {\,7\,} \right]\)

If a matrix A has n rows and n columns then we say it's a _________ matrix.

• A) square
• B) scalar
• C) diagonal
• D) rectangle

Annuity is …..

• A) A series of fixed payment for any period of time
• B) A series of fixed payment for a fixed period of time
• C) A series of any. payments for a fixed period of time
• D) None of these

In a simple bar chart showing the number of books read by 10 students in a class, what does the height of each bar represent?

• A) The number of books read by each individual student
• B) The number of students in the class
• C) The average number of books read by each student
• D) The total number of books read by all students

${\text{If}}\,\,\,{\sum {{W_i}X} _i} = 4900\,\,\,{\text{and}}\,\,\,\sum {{W_i}} = 70\,\,\,\,{\text{then}}\,\,\,{{\bar X}_w} = \_\_\_\_\_\_\_\_\_\_.$

• A) 343000
• B) 70
• C) 5060
• D) 5830

Volume can be measured by __________ scale.

• A) nominal
• B) interval
• C) ratio
• D) ordinal

In statistics, a/an __________ often means any sort of numerical recording of information.

• A) observation
• B) classification
• C) experiment
• D) variable

A ______________ consists of a circle which is divided into two or more parts in accordance with the number of distinct categories that we have in our data.

• A) bar graph
• B) column graph
• C) pie chart
• D) line graph

In Bivariate situation we have to deal with .....

• A) two variables
• B) four variables
• C) one variable
• D) three variables

In a dataset with the values 2, 4, 6, 8, and 10, what is the arithmetic mean?

• A) 10
• B) 6
• C) 8
• D) 4

How are the bars arranged in a component bar chart?

• A) Vertically, with each segment representing a different category
• B) Vertically, with different bars representing different categories
• C) Diagonally, with each segment representing a different category
• D) In a circular fashion, with each segment representing a different category

What does the mode represent in a dataset?

• A) The value that occurs most frequently
• B) The average value
• C) The middle value
• D) The value that occurs least frequently