Which one of the following wquations represents a true mathematical characteristics of mean ?

• ∑(X - X͞) = minimum

• ∑(X - X͞) = 0

• ∑(X - X͞) = maximum

• ∑(X - X͞) = infinite

Which one of the following processes is the main task for the computer in mapping the geographical data ?

• Data retrieving and drawing

• Data collection

• Data visualization

• Data storage

Which one of the follwoing mapping techniques is correct to show delineated areas having different colours ?

• Isopleth

• Choropleth

• Chorochromatic

• Choroschematic

Which one of the following diagrams represents the occupational structure of population ?

• Contour

• Isopleth

• Pie Diagram

• Choropleth

ASSERTION (A) : Nearest Neighbour Analysis (NNA) is an approach to the study of point , line and area patterns.

REASON (R) : Measurement of distance by comapring the observed mean distances with the expected mean distances between sampled points and their nearest neighbours.

• (A) is true , but (R) is false.

• (A) is false , but (R) is true.

• Both (A) and (R) are true and (R) is the correct explanation of (A).

• Both (A) and (R) are true , but (R) is not the correct explanation of (A).

Which one of the following variables is correct to divide a universe of 500 students of a class into two by their gender and then take a random sample of the males and a random sample of females ?

• Dependent variable

• Control variable

• Independent variable

• Stratified variable

Who amongst the following developed the concept of mental map ?

• Saarinen

• Gould and White

• Boulding and Hägerstrand  

• Downs and Stea

Which one of the following features creates problems in the Satellite Remote Sensing Data ?

• Land cover

• Cloud cover

• Water cover 

• Vegetation cover

Which one of the following random samoling techniques becomes more appropriate for homogenous population groups ?

• Proportionate

• Simple

• Stratified

• Systematic

Variable Y regresses with variable X with the conditions that X͞ = 5.50 ,  Y͞ = 3.50 and b = 1-50 in the linear regression model (Y = a + bx) , where  Y͞ and X͞  are means of the respective variables and b refers to gradient of line Y w.r.t X. Which one of the following values of parameter "a" of  the model is correct ?

• 3.75

• -5.75

• 1.75

• -4.75