CDS | Elementary Mathematics | Frequency Distribution

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Question 1

Consider the following statements :
1) The classes of type 15-19, 20-24, 25-29 etc. are exclusive classes.
2) The classes of type 15-20, 20-25, 25-30 etc. are inclusive classes.
Which of the above statements is/are correct?

• A1 only
• B2 only
• CBoth 1 and 2
• DNeither 1 nor 2

Question 2

Data on ratings of hotels in a city is measured on

• ANominal scale
• BOrdinal scale
• CInterval scale
• DRatio scale

Question 3

The age distribution of 40 children is as follows:

Consider the following statements in respect of the above frequency distribution:
1) The median of the age distribution is 7 years.
2) 70% of the children are in the age group 6-9 years.
3) The modal age of the children is 8 years.
Which of the above statements are correct?

• A1 and 2 only
• B2 and 3 only
• C1 and 3 only
• D1, 2 and 3

Question 4

Frequency density of a class is computed by the ratio

• AClass frequency to the class width
• BClass frequency to total frequency
• CClass frequency to total number of classes
• DCumulative frequency up to that class to total frequency

Question 5

Consider the following statement related to cumulative frequency polygon of a frequency distribution, the frequencies being cumulated from the lower end of the range.
1). The cumulative frequency polygon gives an equivalent representation of frequency distribution table.
2). The cumulative frequency polygon is a closed polygon with one horizontal and one vertical side. The other sides have non-negative slope.
Which of the above statements is/are correct?

• A1 only
• B2 only
• CBoth 1 and 2
• DNeither 1 nor 2

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