Measures Of Central Tendency Flashcards
- The most commonly used measure of central tendency is
Arithmetic mean
x = ∑x/n is related to
Arithmetic Mean
Five students obtained 10, 20, 30, 40 and 50 marks respectively. What would be the Arithmetic mean?
30
The average affected most by the presence of extreme values is
Arithmetic Mean
The sum of deviation of items obtained from Arithmetic mean is always equal to
0
Assigning weights to various item according to their importance is called
Assigning weights to various item according to their importance is called
Which of the following represent Median?
Q2
. Quartiles divide the data into how many equal parts?
4
Percentiles divide the distribution into how many equal parts?
100
The word ‘Mode’ has been derived from this language
french
______________ Arithmetic mean gives relative importance to each item.
weighted
There are ______________ Quartiles in a series.
3
Third quartile and ____________ percentile are the same.
75
_________________ is not affected by the extreme values.
median
A distribution with more than two modes is called ____________
multi modal
What is meant by central tendency?
Central tendency is one of the statistical tools which summarize the data in a single
value in such a way that this single value can represent the entire data.
What is the meaning of Arithmetic mean?
Arithmetic mean is defined as the sum of the values of all observations divided by
number of observations
Write the formula for weighted mean?
w=∑wx
———-
∑w
Define Median?
Median is the middle element when data set is arranged in order of the magnitude
Find the Median for the following data: 15, 25, 35, 40, 48
Median is the middle element when data set is arranged in order of the magnitude.
As data is arranged 35 is the median
What do you mean by percentiles?
Percentiles are those measures which divides the distribution into hundred equal parts
Calculate mode from the following data
X=10,8,10,6,4,12,10,8,10,18,16,10,18,16.
10 is the mode as it has occurred maximum times.
