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The class mark of the class interval 120...

The class mark of the class interval `120-130` is...a)`125` b)`122.5` c)`120` d)`130`

A

120

B

130

C

122.5

D

125

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CHETANA PUBLICATION-Statistics-EXERCISE
  1. The formula to find mean from a grouped frequency table is bar x=A+g((...

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  2. The formula to find mean by direct method is ..........

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  3. Class width of any class interval is.....a) Lower limit + upper limit ...

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  4. The formula for median is.... a) L+(N/2-c.f.)h/fb)L/2+(N/2-c.f.)h/f c)...

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  5. The formula to find the mean deviation(bar d) in Assumed mean method i...

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  6. In step deviation method, ui is given by...a)A+bar d b)(xi-A)/g c)(xi+...

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  7. If sum fi di =1885 and sum fi=100, then the value of bar d is...a)1.88...

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  8. The formula of mode is....a)L+[(f1-f0)/(2f1-f0-f2)] xxh b)L-[(f1-f0)/(...

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  9. The formula to find mean by step deviation method is....a)(sum fiui)/(...

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  10. A pie diagram represents the number of valid votes obtained by four st...

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  11. A pie diagram represents the number of valid votes obtained by four st...

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  12. A pie diagram represents the number of valid votes obtained by four st...

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  13. A pie chart gives the marks scored in an examination by a student in v...

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  14. A pie chart gives the marks scored in an examination by a student in v...

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  15. A pie chart gives the marks scored in an examination by a student in v...

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  16. The class mark of the class interval 120-130 is...a)125 b)122.5 c)120 ...

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  17. The class width of the class interval 133-139 is...a)3 b)5 c)6 d)4

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  18. The persons of O-blood group are 40%. The classification of persons ba...

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  19. For a certain frequency distribution median class is 129.5 to 134.5, f...

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  20. Find the mean of the following data 12,18,15,17,11,10.

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