Class mark of a particular class is 9.5 and the class size is 6, then the class interval is

3.5 - 15.5

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12.5 - 18.5

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6.5 - 12.5

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15.5 - 27.5

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Solution

The correct option is B 6.5 - 12.5
Classmark} = 9.5
Upper limit of class = $Class mark + \frac{class size}{2} = 9.5 + 3 = 12.5$
Lower limit of class = $Class mark - \frac{class size}{2} = 9.5 - 3 = 6.5$
Hence, the class interval is 6.5-12.5.

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Similar questions

The class size of a distribution is 25 and the first class- interval is 200- 224. There are seven class - intervals.
(i) Write the class - intervals.
(ii) Write the class - marks of each interval.

Q. The class size of a distribution is 25 and the first class-interval is 200-224. There are seven class-intervals.

(i) Write the class-intervals.

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Q. Class mark of a particular class is 9.5 and the class size is 6, then the class interval is

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Class mark of a particular class is 9.5 and the class size is 6, then the class interval is

The correct option is B 6.5 - 12.5Classmark} = 9.5 Upper limit of class = Class mark+class size2=9.5+3=12.5 Lower limit of class = Class mark−class size2=9.5−3=6.5 Hence, the class interval is 6.5-12.5.

The correct option is B 6.5 - 12.5
Classmark} = 9.5
Upper limit of class = $Class mark + \frac{class size}{2} = 9.5 + 3 = 12.5$
Lower limit of class = $Class mark - \frac{class size}{2} = 9.5 - 3 = 6.5$
Hence, the class interval is 6.5-12.5.