If a data set has an even number of observations, the median
is the average value of the two middle items
must be equal to the mean
cannot be determined
is the average value of the two middle items when all the items are arranged in ascending order
Construction of a cumulative frequency table is useful in determining the
Mean
Median
Mode
All the above three measures
What is the range?4 , -1 , -3 , 4 , 3 , -3 , 9 , -3
6
7
8
12
The difference between the largest and the smallest data value is the
Variance
Range
What is the median?
1 , 5 , 3 , 7 , 10 , 5 , 4.
5
10
The arithmetic mean of first n natural number is
n/2
n/2 + 1
(n + 1)/2
(n -1)/2
__________ is defined as the number corresponding to the cumulative frequency equal to half the total frequency.
The middle most observation of a statistical data when they are arranged in ascending order is called
None of these
Given the following set of data , what is the range?
[12 , 23 , 35 , 54 , 21 , 8 , 9 , 67 ]
55
59
56
A data has 25 observations (arranged in descending order ) which observation represents the median?
12th
13th
14th
15th
