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STA301 Quiz No.2 Shared by Madiha

Question # 1 of 10 ( Start time: 07:44:18 PM ) Total Marks: 1
For empirical rule approximately all observations fall within
Select correct option:
Xbar (+-) S.D
Xbar (+-) 2*S.D
Xbar (+-) 3*S.D                 ok
Xbar (+-) S.D


Question # 2 of 10 ( Start time: 07:45:14 PM ) Total Marks: 1
When a coin is tossed, then sample space consists of:
Select correct option:
2 outcomes                        ok
4 outcomes
6 outcomes
8 outcomes


Question # 3 of 10 ( Start time: 07:46:27 PM ) Total Marks: 1
Given the least squares regression line Y^= 5-2x:
Select correct option:
the relationship between x and y is positive
the relationship between x and y is negative
as x decreases, so does y
None of the above


Question # 4 of 10 ( Start time: 07:47:55 PM ) Total Marks: 1
Fourth moment about mean provides information about the_________ of the distribution.
Select correct option:
Centre                  ok
Dispersion
Symmetry
Kurtosis


Question # 5 of 10 ( Start time: 07:49:13 PM ) Total Marks: 1
If A and B are mutually exclusive events and P (A) = 4/36 and P (B) = 6/36, then P(AUB) will be
Select correct option:
11/36
10/36                     ok
5/36
9/36


Question # 6 of 10 ( Start time: 07:50:30 PM ) Total Marks: 1
In regression line Y=a+bX, X is called:
Select correct option:
Dependent variable
Independent variable                    ok
Explained variable
Regressand


Question # 7 of 10 ( Start time: 07:51:25 PM ) Total Marks: 1
A set which is the sub-set of every set is
Select correct option:
Empty Set                           ok
Power Set
Universal Set
Super Set


Question # 8 of 10 ( Start time: 07:52:27 PM ) Total Marks: 1
In a Box and Whisker plot, right end of the box is referred to as:
Select correct option:
First quartile
Second quartile
Third quartile                     ok
Mode


Question # 9 of 10 ( Start time: 07:53:38 PM ) Total Marks: 1
When the mean deviation is calculated by taking deviations around median; then co-efficent of mean deviation is obtained dividing mean deviation by:
Select correct option:
Mode
Mean                    ok
Median
All above


Question # 10 of 10 ( Start time: 07:55:12 PM ) Total Marks: 1
Difference between the largest and the smallest data values is called:
Select correct option:
variance
interquartile range
range                    ok
coefficient of variation


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