STATISTICS

The difference between the maximum and minimum values of a variable is called ____

• Range 
• Variate
• Frequency
• None of the above

Say 'TRUE' or 'FALSE'
In a histogram the area of each rectangle is proportional to the class size of the corresponding class interval

• TRUE
• FALSE

The closed curve representing continuous grouped frequency distribution is called___

• Frequency Polygon
• Histogram
• Frequency curve
• None of the above

Find the median of the given data (which are arranged in ascending order)
0,3,3,4,5,7,8,11,12

• 5
• 4
• 7
• 6

In the class interval 10-20, 20 - 30, the number 20 is included in _____

• 10 - 20
• 20 - 30
• Both the intervals
• None of these intervals

The class mark of the class 16 - 24 is ______

• 16
• 24
• 20
• None of the above

The class marks of a frequency distribution are given as : 15, 20, 25, ....
The class corresponding to the class mark 20 is _____

• 12.5 - 17.5
• 17.5 - 22.5
• 18.5 - 21.5
• 19.5 - 20.5

The mean of x -1 , x + 1, x + 3 and x + 5 is _______ 

• x + 1
• x + 2
• x + 3
• x + 4

• 21
• 5
• 10
• 15

If each observation of the data is increased by 5, then their mean___

• remains the same
• becomes 5 times the original mean
• is decreased by 5
• is increased by 5