Select the suitable statistical technique to be applied (Mean/Median/Mode/Range/Standard Deviation) for the following problems:
The management of a company wants to know about disparity in salaries of all employees.
Standard Deviation
Teacher wants to know about the average performance of the whole class in a test.
Mean
Compare height of residents of two cities
Mean
Find the dominant value from a set of values
Mode
Compare income of residents of two cities
Mean
Find the popular color for car after surveying the car owners of a small city.
Mode
Explanation
The selection of statistical technique depends on what information is needed: (i) Standard Deviation measures disparity/variability in salaries as it indicates the spread of values around the mean. (ii) Mean gives the average performance of the class. (iii) Mean allows comparison of average heights between two cities. (iv) Mode identifies the dominant/most frequent value. (v) Mean allows comparison of average incomes between two cities. (vi) Mode identifies the most popular (frequently occurring) color from the survey data.