STA301 mid term paper current spring 21 May 2011

[Vuhelper]

1 . which despersion is used to compair variation of two saries.
cv , qd , md. or sd

2 . simultanious occurance of two event called.
joint probability , prior brobability , conditional , (,,,,,,) bhol geya hun (according to past papers)

3 . If all values falls on the same straight line and the line has a positive slope then r is = ?
r=+1 , r=_1 , r <_0 , r <1

4. The variable ploted on the x axis in a scatter diagram called ?
scatter variable, dependent variable , interdependent (It is independent variable)

5. marginal probability ?
P(a/b) ,p (a) , p(aub) (I think it will be P(a/b))

6 , if positively skewed , then mean , median , mode ?
>, <, =, = it is mean>median>mode

7 , if a =4 and b= 2 for a particular estimated line then y=a+bx and the independent variable has a value 3 then value is ?
6 , 9 , 10 . 11 ,

8 , Fm in the formula of mode = ?
maximum value , minimum value ,and two other options are that i forgot
(Frequency of the modal class) page49

9, if a curve has a long tail to the right then?
positive skewd , nagitive skewd , j shaped , symatric

10 , x is a discrete random variable then the function f(x) is ?
A probability function , dansity function , a dansity ,atributionj

11 . bell shaped symatric is the another name of ?
(I think it’s “normal distribution”) but it’s out of course option tu dete
On which chart the time series data is placed ?
histogram, (,,,) , ( ,,,) , (,,,,) (according to past papers)

12 . what is the probability of a spade card ?
13/52 . 1/52 . 4/ 52 . 26/52

13. Is not effected with the most extreme value?
mean , median ,, mode , ( ...)

14, when a patwari collect the data of cotton crops this is?
primary data , secondary data. (,,,,,,) . (,,,,,)

15, some value , 1,1,2,3,4,5,1,2,1,3,2,2,3,3,2,2,2, then the mode is ?
1/3, 2/3, 3/3, 4 (clearly mode is 2)