Students can download 12th Business Maths Chapter 9 Applied Statistics Ex 9.4 Questions and Answers, Samacheer Kalvi 12th Business Maths Book Solutions Guide Pdf helps you to revise the complete Tamilnadu State Board New Syllabus and score more marks in your examinations.

## Tamilnadu Samacheer Kalvi 12th Business Maths Solutions Chapter 9 Applied Statistics Ex 9.4

Choose the correct answer.

Question 1.

A time series is a set of data recorded _______

(a) Periodically

(b) Weekly

(c) Successive points of time

(d) all the above

Answer:

(d) all the above

Question 2.

A time series consists of ________

(a) Five components

(b) Four components

(c) Three components

(d) Two components

Answer:

(b) Four components

Question 3.

The components of a time series which is attached to short term fluctuation are _______

(a) Secular trend

(b) Seasonal variations

(c) Cyclic variation

(d) Irregular variation

Answer:

(d) Irregular variation

Question 4.

Factors responsible for seasonal variations are ______

(a) Weather

(b) Festivals

(c) Social customs

(d) All the above

Answer:

(d) All the above

Question 5.

The additive model of the time series with the components T, S, C and I is _______

(a) y = T + S + C × I

(b) y = T + S × C × I

(c) y = T + S + C + I

(d) y = T + S × C + I

Answer:

(c) y = T + S + C + I

Question 6.

Least square method of fitting a trend is _______

(a) Most exact

(b) Least exact

(c) Full of subjectivity

(d) Mathematically unsolved

Answer:

(a) Most exact

Question 7.

The value of ‘b’ in the trend line y = a + bx is _________

(a) Always positive

(b) Always negative

(c) Either positive or negative

(d) Zero

Answer:

(c) Either positive or negative

Question 8.

The component of a time series attached to long term variation is trended as _______

(a) Cyclic variation

(b) Secular variations

(c) Irregular variation

(d) Seasonal variations

Answer:

(b) Secular variations

Question 9.

The seasonal variation means the variations occurring within ________

(a) A number of years

(b) within a year

(c) within a month

(d) within a week

Answer:

(b) within a year

Question 10.

Another name of the consumer’s price index number is _______

(a) Whole-sale price index number

(b) Cost of living index

(c) Sensitive

(d) Composite

Answer:

(b) Cost of living index

Question 11.

Cost of living at two different cities can be compared with the help of _______

(a) Consumer price index

(b) Value index

(c) Volume index

(d) Un-weighted index

Answer:

(a) Consumer price index

Question 12.

Laspeyre’s index = 110, Paasche’s index = 108, then Fisher’s Ideal index is equal to _______

(a) 110

(b) 108

(c) 100

(d) 109

Answer:

(d) 109

Hint:

Fisher’s Index = \(\sqrt{110 \times 108}\) = 109

Question 13.

Most commonly used index number is _________

(a) Volume index number

(b) Value index number

(c) Price index number

(d) Simple index number

Answer:

(c) Price index number

Question 14.

Consumer price index are obtained by ________

(a) Paasche’s formula

(b) Fisher’s ideal formula

(c) Marshall Edgeworth formula

(d) Family budget method formula

Answer:

(d) Family budget method formula

Question 15.

Which of the following Index number satisfy the time-reversal test?

(a) Laspeyre’s Index number

(b) Paasche’s Index number

(c) Fisher’s Index number

(d) All of them

Answer:

(c) Fisher’s Index number

Question 16.

While computing a weighted index, the current period quantities are used in the _______

(a) Laspeyre’s method

(b) Paasche’s method

(c) Marshall Edgeworth method

(d) Fisher’s ideal method

Answer:

(b) Paasche’s method

Question 17.

The quantities that can be numerically measured can be plotted on a ________

(a) p – chart

(b) c – chart

(c) x bar chart

(d) np – chart

Answer:

(c) x bar chart

Question 18.

How many causes of variation will affect the quality of a product?

(a) 4

(b) 3

(c) 2

(d) 1

Answer:

(c) 2

Question 19.

Variations due to natural disorder is known as _______

(a) random cause

(b) non-random cause

(c) human cause

(d) all of them

Answer:

(a) random cause

Question 20.

The assignable causes can occur due to _______

(a) poor raw materials

(b) unskilled labour

(c) faulty machines

(d) all of them

Answer:

(d) all of them

Question 21.

A typical control charts consists of ________

(a) CL, UCL

(b) CL, LCL

(c) CL, LCL, UCL

(d) UCL, LCL

Answer:

(c) CL, LCL, UCL

Question 22.

\(\bar{X}\) chart is a ______

(a) attribute control chart

(b) variable control chart

(c) neither Attribute nor variable control chart

(d) both Attribute and variable control chart

Answer:

(b) variable control chart

Question 23.

R is calculated using ______

(a) \(x_{\max }-x_{\min }\)

(b) \(x_{\min }-x_{\max }\)

(c) \(\bar{x}_{\max }-\bar{x}_{\min }\)

(d)

Answer:

(a) \(x_{\max }-x_{\min }\)

Question 24.

The upper control limit for \(\bar{X}\) chart is given by _______

(a) \(\overline{\mathrm{X}}+\mathrm{A}_{2} \overline{\mathrm{R}}\)

(b)

(c)

(d)

Answer:

(c)

Question 25.

The LCL for R chart is given by ________

(a) \(\mathrm{D}_{2} \overline{\mathrm{R}}\)

(b)

(c)

(d) \(\mathbf{D}_{3} \overline{\mathbf{R}}\)

Answer:

(d) \(\mathbf{D}_{3} \overline{\mathbf{R}}\)