Statistics Test

Question 1
1 / -0

Consider the data: $$2, x, 3, 4, 5, 2, 4, 6, 4$$ where $$x >2$$
The mode of the data is _____

A
$$2$$

B
$$3$$

C
$$4$$

D
$$5$$

Question 2
1 / -0

For the given data, SD $$= 10$$, AM $$= 20$$ the coefficient of variation is ...........

A
$$47$$

B
$$24$$

C
$$44$$

D
$$50$$

Question 3
1 / -0

Find the standard deviation of $$210, 240, 250, 260, 220, 230$$ and $$270$$.

A
$$18$$

B
$$20$$

C
$$22$$

D
$$25$$

Question 4
1 / -0

The ages (in years) of a family of 6 members are 1, 5, 12, 15, 38 and 40. The standard deviation is found to be 15.9. After 10 years the standard deviation is

A
increased

B
decreased

C
remains same

D
none of these

Question 5
1 / -0

Find the mode of 0,0,2,2,3,3,3,4,5,5,5,5,6,6,7,8

A
8

B
0

C
2

D
5

Question 6
1 / -0

Find the mean for the following data using step deviation method.

A
$$4$$

B
$$5$$

C
$$6$$

D
$$7$$

Question 7
1 / -0

Branch
A
Branch
B Branch
C Branch
D
Q1 4.1 7.4 8.0 5.4
Q2 3.6 5.2 3.7 6.2
Q3 5.0 4.5 4.9 4.8
Q4 4.9 6.3 5.9 5.6
$$\overline { x } $$ 4.4 5.85 5.625 5.5
$$s$$ 0.67 1.27 1.82 0.85

A company wants to close one of its branch due to recession. The table given shows each branch's quarterly profit data with mean $$(\bar{x})$$ and standard deviation $$(s)$$. Company's finance department recommendations were taken into final conclusion. Finance department recommends to close either the store with the lowest average profits or the store that performs the least consistently. According to the data, which branches will the finance department recommend for closure to the board?

A
Branches A or C

B
Branches A or D

C
Branches B or C

D
Branches B or D

Question 8
1 / -0

Choose the formula used for arithmetic mean of grouped data by step deviation method is

A
$$\bar { x } =A-\dfrac { \sum { fd\prime } }{ \sum { f } } \times i$$

B
$$\bar { x } =A\times \dfrac { \sum { fd\prime } }{ \sum { f } } \times i$$

C
$$\bar { x } =A+\dfrac { \sum { fd\prime } }{ \sum { f } } \times i$$

D
$$\bar { x } =A+\dfrac { \sum { fd\prime } }{ \sum { f } } +i$$

Question 9
1 / -0

Find the mean for the following data using step deviation method.

A
$$9$$

B
$$10$$

C
$$11$$

D
$$12$$

Question 10
1 / -0

Find the mean for the following data using step deviation method.

A
$$43$$

B
$$44$$

C
$$45$$

D
$$46$$

Submit Test

	Branch A	Branch B	Branch C	Branch D
Q1	4.1	7.4	8.0	5.4
Q2	3.6	5.2	3.7	6.2
Q3	5.0	4.5	4.9	4.8
Q4	4.9	6.3	5.9	5.6
$$\overline { x } $$	4.4	5.85	5.625	5.5
$$s$$	0.67	1.27	1.82	0.85

Statistics Test...

Question 1

$$2$$

$$3$$

$$4$$

$$5$$

Question 2

$$47$$

$$24$$

$$44$$

$$50$$

Question 3

$$18$$

$$20$$

$$22$$

$$25$$

Question 4

increased

decreased

remains same

none of these

Question 5

8

0

2

5

Question 6

$$4$$

$$5$$

$$6$$

$$7$$

Question 7

Branches A or C

Branches A or D

Branches B or C

Branches B or D

Question 8

$$\bar { x } =A-\dfrac { \sum { fd\prime } }{ \sum { f } } \times i$$

$$\bar { x } =A\times \dfrac { \sum { fd\prime } }{ \sum { f } } \times i$$

$$\bar { x } =A+\dfrac { \sum { fd\prime } }{ \sum { f } } \times i$$

$$\bar { x } =A+\dfrac { \sum { fd\prime } }{ \sum { f } } +i$$

Question 9

$$9$$

$$10$$

$$11$$

$$12$$

Question 10

$$43$$

$$44$$

$$45$$

$$46$$

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