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 (d) All these

In volume diagram the three dimensions which are taken into account are  Length, height, breadth

Cyclic variation Occur at intervals of more than 1 year  

If the value of a series are equal , S.D is Zero.

 (c) Co.efficient

Pie chart is always circular. 

In standard deviation, deviations are measured from Mean.

In Standard deviation , deviations are taken only from mean values of series

Operation condition is not a factor responsible for seasonal variation.

Cost of living index is known as consumer price index.

If the mean deviation of a distribution is 3.6, standard deviation is 6.0. 

 Standard deviation is always greater  than mean deviation. 

Q.D is the half distance between the third and first quartiles. 

An average summarizes The given data.

The Fisher’s index number is the Geometric mean of Laspeyre’s and Paashe;s index numbers. 

Fishers is the geometric mean of Laspeyre’s and Paashe’s Index number. 

The mean of 5 numbers is 10, afterwards a new number is added. The mean of 6 number is 11.

 Mode is not affected by extreme items. 

A frequency distribution obtained by the simultaneous classification of data according to two characteristics is known as a bivariate frequency distribution.

Median the distribution is of open end classes which average may appropriate. 

Median is a positional average. 

Before any procedures for  Data collection  are established, the purpose and the scope of the study must be clearly specified. 

The Correct option is  b. 2008 

 In the case of the questionnaire method of gathering data, it should be made certain that all the questions have been Answered

There are equal number of observations on the right and on the left of median value.

H.M is used in averaging rates , times etc. 

Geometric mean considered to be the best average in the construction of Index numbers .

The term 'Weight‘ refers to the relative importance of the different items in the construction of the index. For example in daily use the importance of wheat and rice is more than jute and iron. 

Weights can be classified as follows - 

(i) Explicit and Implicit weights : Explicit weights are called direct weight. They may be in the form of quantity or value. In implicit weighing, a commodity or its variety is included in the index a numbers of times. 

(ii) Fixed and Fluctuating Weight : If same weights are used from year to year, they are called fixed weights. If weights are changed from time to time, they are called fluctuating weights. 

(iii) Arbitrary and Real Weights : If real quantities or units are used, then those weights are called real weights.

If some unrealistic weights, according to the own will and assumptions of the investigator are used, they are called arbitrary weights. 

Weights are used in construction of Index numbers because all items are not of equal importance and hence it is necessary to device some suitable method where by the varying importance of the different items is taken into account. This is done by allocating weights.

a. index numbers

Primary data  is one which is collected by the investigator himself for the purpose of a specific inquiry or study.

When an investigator uses the data which has already been collected by others, such data is called  Secondary data

Mode  is not unique. 

Extreme values have effect on Median. 

A distribution may have more than one mode.

Harmonic Mean is useful for computing average rate of increase of profits , average rate of speed , average price ..etc. 

Smaller animals lose body heat much faster while larger animals lose less body heat.

Restriction enzymes /Endonucleases or Exonucleases

Intercalated discs contain gap junctions and desmosomes. The gap junctions, which are protein-lined tunnels, allow direct transmission of the depolarizing current from cell to cell, across the chambers of the heart, so that the cells contract in unison.

Cardiac muscle cells are equipped with three distinct types of intercellular junction--gap junctions, "spot" desmosomes, and "sheet" desmosomes (or fasciae adherentes)--located in a specialized portion of the plasma membrane, the intercalated disk.

Intercalated discs are unique structural formations found between the myocardial cells of the heart. They play vital roles in bonding cardiac muscle cells together and in transmitting signals between cells.

Multiples of 7 : .7,14,21............

It's forming an A.p 

S = n/2(2a+n-1)d 

  = 20/2 (2*7 + 19*7) 

  = 10* ( 14 + 133) 

   = 1470 

Given

\((2\vec A + 3\vec B) \) and \((3\vec A - 4\vec B)\)

Vector product 

\((2\vec A + 3\vec B) \times (3\vec A - 4\vec B)\) 

\(= 2(\vec A \times \vec A) - 8 (\vec A \times \vec B) + 9(\vec B\times \vec A) - 12 (\vec B \times \vec B)\)

\(= - 8(\vec A \times \vec B) - 9(\vec A \times \vec B) - 0\)

\(= -17 (\vec A \times \vec B)\)

Force : F=50N ; Mass : m=20kg ; Initial velocity : u=15m/s

From newton’s second law, F=ma

50=20×a

a=2.5m/s²

From equations of motion , v=u+at

 0 =15+(−2.5)t

Solve to get : t = 6s

Hence, the body will be stop in 6 seconds

d. Weather and all nonliving organisms

(a) Drop in half

The correct answer is: (b) Right

(a) -273 degrees C

(d) No holes or free electrons

(a) Equals the number of holes

The correct answer is:(a) Small

(b) Increases

(b) Input resistance