The component of a time series which is attached to short term fluctuations is __________

(a)

Seasonal variations

(b)

Cyclic variation

(c)

Irregular variation

(d)

all the above

Cyclic variations in a time series are caused by __________

(a)

Lock out in a factor

(b)

war

(c)

floods

(d)

none of above

The terms prosperity, recession, depression  and recovery are in particular attached to __________

(a)

Secular trend

(b)

Seasonal fluctuation!

(c)

Cyclic movements

(d)

irregular variation

A decline in the sales of ice cream during November to March is associated with __________

(a)

Seasonal variation

(b)

Cyclical variation

(c)

random variation

(d)

Secular trend

Index number is a __________

(a)

Measure of relative changes

(b)

Special type of an average

(c)

a percentage relative

(d)

all the above

Index numbers are expressed in terms of __________

(a)

percentages

(b)

ratios

(c)

absolute value

(d)

all the above

Most commonly used index numbers are _________ index number

(a)

diffusion

(b)

price

(c)

value

(d)

none of these

Chance variation in the manufactured product is __________

(a)

controllable

(b)

not controllable

(c)

both (a) and (b)

(d)

none of these

Variation due to assignable causes in the product occur due to, _____

(a)

faulty process

(b)

carelessness of operators

(c)

poor quality of raw material

(d)

all the above.

The causes leading to vast variation in the specification of a product are usually due to _____

(a)

random process

(b)

assignable causes

(c)

non-traceable causes

(d)

all the above

Most frequently used index number formulae are_____

(a)

weighted

(b)

unweighted

(c)

fixed weighted

(d)

none of these

An additive model of time series with the components T, S, C and I is __________

(a)

y = T + S + C - I

(b)

y = T + S x C + I

(c)

y = T + S + C + I

(d)

y = T + S + C x I

The normal equations for estimating a and b so that the line y = ax + b may be the line of best fit are __________

(a)

aΣx² + bΣx = Σxy, aΣx + nb = Σy

(b)

aΣx + bΣx² = Σxy, aΣx² + nb = Σy

(c)

aΣx + nb = Σxy, aΣx² + bΣx = Σy

(d)

aΣx² + nb = Σxy, aΣx + bΣx = Σy

In a line of best fit y = 5.8 (x - 1994) + 41.6, the value of y when x = 1997 is _____

(a)

50

(b)

54

(c)

59

(d)

60

Fine data relating to x and yare to be fit in a straight line. It is found that Σx = 0 and Σy = 15. Then the y- intercept of the line is_____

(a)

1

(b)

2

(c)

3

(d)

42