16 Questions
What is another name for arithmetic average?
Mean
What term refers to the middle value in a distribution?
Median
Who introduced the concept of standard deviation in 1893?
Karl Pearson
What is the value which occurs the greatest number of times in a series called?
Mode
In Yule’s coefficient of association, what type of association is indicated if Q = 1?
Perfect positive
What is the term for the number of observations falling in a particular class?
Frequency
What is the median of the data 10,15,9,25,19?
15
What does the algebraic sum of the deviations of all the items from their arithmetic mean equal to?
Zero
What is the general formula for mean?
$\sum x$
For finding mean by the method of step deviation, what does the symbol A denote?
Assumed mean
What is the mode of the data 45,55,50,45,40,45?
45
If for a frequency distribution, the values of median and mean are 72 and 78, what is the value of mode?
60
What is the difference between the largest and the smallest observation known as?
Range
What is the other name for standard deviation?
Mean error
What is the formula for coefficient of correlation?
$\sum xy$
What does Coefficient of correlation lie between?
0 and 1
Test your knowledge of arithmetic mean and standard deviation with this quiz. Questions cover topics such as the definition of arithmetic average, standard deviation, and key historical figures in the development of these concepts.
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