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STA301 Online 5 Quizzes from Lectures 1-27

1.     Question # 1 of 10 ( Start time: 08:23:14 PM )         Total M a r k s: 1

If Y=bX, then variance of Y is
Select correct option:
             b*2 var(x)
            var(x)
            b var(x)
            b square root var(x)

 

 

2.     Question # 2 of 10 ( Start time: 08:24:38 PM )         Total M a r k s: 1
If f(x) is a continuous probability function, then P(X = 2) is:
Select correct option:
       1
       0
       1/2
       2

 

3.     Question # 3 of 10 ( Start time: 08:25:52 PM )         Total M a r k s: 1
In regression line Y=a+bX, Y is called:
Select correct option:
       Dependent variable
       Independent variable
       Explanatory variable
       Regressor

 4.     Question # 4 of 10 ( Start time: 08:26:51 PM )         Total M a r k s: 1

If A and B are mutually exclusive events with P (A) =0.25 and P (B) = 0.50, Then P (A or B) =………
Select correct option:
       0.25
       0.75
       0.50
       1

5.     Question # 5 of 10 ( Start time: 08:28:06 PM )         Total M a r k s: 1
Symbolically, a conditional probability is:
Select correct option:
       P(AB)
       P(A/B)
       P(A)
       P(AUB)

6.     Question # 6 of 10 ( Start time: 08:28:42 PM )         Total M a r k s: 1
In a 52 well shuffled pack of 52 playing cards, the probability of drawing any one diamond card is
Select correct option:
       1/52
       4/52
       13/52
       52/52

7.     Question # 7 of 10 ( Start time: 08:30:13 PM )         Total M a r k s: 1
Probability of a sure event is
Select correct option:
       8
       1
       0
       0.5

8.     Question # 8 of 10 ( Start time: 08:31:42 PM )         Total M a r k s: 1
If Y=3X+5,then S.D of Y is equal to
Select correct option:
       9 s.d(x)
       3 s.d(x)
       s.d(x)+5
       3s.d(x)+5

    Question # 9 of 10 ( Start time: 08:33:16 PM )         Total M a r k s: 1

The probability of drawing a red queen card from well-shuffled pack of 52 playing cards is
Select correct option:
       4/52
       2/52
       
13/52
       26/52

10.                        Question # 10 of 10 ( Start time: 08:34:40 PM )         Total M a r k s: 1
If P (B|A) = 0.25 and P (A and B) =0.20, then P (A) is
Select correct option:
       0.05
       0.80
       0.95
       0.75

11.                        Question # 1 of 10 ( Start time: 08:57:45 PM )         Total M a r k s: 1
When a coin is tossed 3 times, the probability of getting 3 tails is
Select correct option:
       1/8
       3/8
       3/6
       2/8

12.                        Question # 2 of 10 ( Start time: 08:59:14 PM )         Total M a r k s: 1
In how many ways can a team of 11 players be chosen from a total of 16 players?
Select correct option:
       4368(not confirmed)
       2426
       5400
       2680

 13.                        Question # 3 of 10 ( Start time: 09:00:38 PM )         Total M a r k s: 1

The standard deviation of c (constant) is
Select correct option:
       c
       c square
       0
       does not exist

14.                        Question # 4 of 10 ( Start time: 09:01:46 PM )         Total M a r k s: 1
If P (E) is the probability that an event will occur, which of the following must be false:
Select correct option:
       P(E)= - 1
       P(E)=1
       P(E)=1/2
       P(E)=1/3

 Question # 5 of 10 ( Start time: 09:02:48 PM )         Total M a r k s: 1

Let E and F be events associated with the same experiment. Suppose the E and F are independent and that P(E) = 1/4 and P(F) = 1/2 Then P(E U F) is:
Select correct option:
       1/8
       3/4
       7/8
       5/8

16.                        Question # 6 of 10 ( Start time: 09:04:09 PM )         Total M a r k s: 1
A student solved 25 questions from first 50 questions of a book to be solved. The probability that he will solve the remaining all questions is:
Select correct option:
       0.25
       0.5
       1
       0

17.                        Question # 7 of 10 ( Start time: 09:05:31 PM )         Total M a r k s: 1
If Y=bX, then variance of Y is
Select correct option:
       b*2 var(x)
       var(x)
       b var(x)
       b square root var(x)

 

 

18.                        Question # 9 of 10 ( Start time: 09:07:48 PM )         Total M a r k s: 1
The classical definition of probability assumes:
Select correct option:
       Exhaustive events
       Mutually exclusive events
       Equally likely evens
       Independent evens

19.                        Question # 10 of 10 ( Start time: 09:08:50 PM )         Total M a r k s: 1
In scatter diagram, the variable plotted along Y-axis is:
Select correct option:
       Independent variable
       Dependent variable
       Continuous variable
       Discrete variable

20.                        Which of the following measures of dispersion are based on deviations from the mean?  
Select correct option:  

Variance 
 
Standard deviation 
Mean deviation 

All of the these

21.                        What does it mean when a data set has a standard deviation equal to zero?  
Select correct option:  

All values of the data appear with the same frequency.  
The mean of the data is also zero.  
All of the data have the same value.  
There are no data to begin with.

 

 

22.                        A set of possible values that a random variable can assume and their associated probabilities of occurrence are referred to as ________.  
Select correct option:  

Probability distribution 
The expected return 
The standard deviation 
Coefficient of variation

23.                        Which of the following can never be probability of an event?  
Select correct option:  



0.5 
-0.5

24.                        The standard deviation of -1, -1, -1, -1 will be  
Select correct option:  


-1 

Does not exist

25.                        Which formula represents the probability of the complement of event A:  
Select correct option:  

1 + P (A) 
1 - P (A) 
P (A) 
P (A) -1

26.                        The Special Rule of Addition is used to combine:  
Select correct option:  

Independent Events 
Mutually Exclusive Events 
Events that total more than 1.00 
Events based on subjective probabilities

27.                        set which is the sub-set of every set is  
Select correct option:  

Empty Set 
Power Set 
Universal Set 
Super Set

28.                        E(4X + 5) =________  
Select correct option:  

12 E (X) 
4 E (X) + 5 
16 E (X) + 5 
16 E (X)

29.                        When two dice are rolled the number of possible sample points is :  
Select correct option:  


12 
24 
36

30.                        Question # 1 of 10 ( Start time: 09:43:04 PM )  Total M a r k s: 1  
If two events A and B are not mutually exclusive then  
Select correct option:  

P (A or B) = P (A) + P (B) – P (A and B)

P (A or B) = P (A) + P (B)

P (A or B) = P (A) x P (B)

P (A or B) = P (A) + P (B)

 31.         

Question # 2 of 10 ( Start time: 09:43:59 PM )  Total M a r k s: 1  
Evaluate (10-4)!  
Select correct option:  

1000 
720 
480 
32

32.                        Question # 3 of 10 ( Start time: 09:45:01 PM )  Total M a r k s: 1  
When E is an impossible event, then P(E) is:  
Select correct option:  




0.5

33.                        Question # 4 of 10 ( Start time: 09:46:20 PM )  Total M a r k s: 1  
When we toss a coin , we get only:  
Select correct option:  

1 outcome 
2 outcome 
3 outcome 
4 outcome

34.                        

Question # 5 of 10 ( Start time: 09:47:15 PM )  Total M a r k s: 1  
For exhaustive events, the P(AUBUC) is equal to:  
Select correct option:  

P(A) 
P(S) 
P(A) * P(B)* P(C) 
P(B)

35.                        Question # 6 of 10 ( Start time: 09:48:21 PM )  Total M a r k s: 1  
A student solved 25 questions from first 50 questions of a book to be solved. The probability that he will solve the remaining all questions is:  
Select correct option:  

0.25 
0.5 

0

36.                        A set of possible values that a random variable can assume and their associated probabilities of occurrence are referred to as ________.  
Select correct option:  

Probability distribution 
The expected return 
The standard deviation 
Coefficient of variation

37.                        
Question # 9 of 10 ( Start time: 09:50:35 PM )  Total M a r k s: 1  
If we roll a die then probability of getting a ‘6’ will be  
Select correct option:  

2/6

1/6

4/6

1

 

38.                        Question # 10 of 10 ( Start time: 09:51:36 PM )  Total M a r k s: 1  
If P(A) = 0.45, P(B) = 0.35, and P(A and B) = 0.25, then P(A | B) is:  
Select correct option:  

1.4 
1.8 
0.714 
0.556

 

 

 

 

39.                        Question # 8 of 10 ( Start time: 09:49:53 PM )  Total M a r k s: 1  
Which of the following is not a measure of central tendency?  
Select correct option:  

Percentile

Quartile

Standard deviation

Mode

40.                        Question # 1 of 10 ( Start time: 09:56:49 PM )  Total M a r k s: 1  
Random experiment can be repeated any no. of times under the……… conditions.  
Select correct option:  

Different  
Similar  

42.                        Question # 3 of 10 ( Start time: 09:58:41 PM )  Total M a r k s: 1  
The simultaneous occurrence of two events is called:  
Select correct option:  

Joint probability 
Subjective probability 
Prior probability 
Conditional probability

43.                        Question # 4 of 10 ( Start time: 09:59:47 PM )  Total M a r k s: 1  
In regression analysis, the variable that is being predicted is the  
Select correct option:  

Dependent variable 


Independent variable 

Intervening variable 

None of these 

 

thanks Sir

i need midterm mcqs recover lecture 1 to 22. plz send me if any one has or post here urgently needed.

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