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The marks scored by 40 students in a 60 ...

The marks scored by 40 students in a 60 mark test of english are as follows ,

Prepare the frequency distribution with classes 0-9,10-19,…..

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The weights (in kg) of 30 girls of Primestreet Society are as below: Prepare a frequency distribution with classes 30-35, 35-40 ....

The information regarding the marks scored by 30 students in a 20 mark test of Mathematics is given below: Find the mean of the data.

Write the mark wise frequencies in the following frequency distribution table.

A company manufactures car batteries of particular type. The life (in years) of 40 batteries was recorded as follows: Construct a grouped frequency distribution table with exclusive classes for this data, using class intervals of size 0.5 starting from the interval 2-2.5.

The distance (in km) of 40 engineers from their residence to their place of work were found as follows : Construct a grouped frequency distribution table with class size 5 for the data given above taking the first interval as 0-5 (5 not included). What main features do you observe from this tabular representation ?

A study was conducted to find out the concentration of sulphur dioxide in the air in parts per million (ppm) of a certain city. The data obtained for 30 days is as follows: (i) Make a grouped frequency distribution table for this data with class intervals as 0.00 -0.04, 0.04 -0.08, and so on. (ii) For how many days, was the concentration of sulphur dioxide more than 0.11 parts per million ?

Consider the marks obtained (out of 100 marks) by 30 students of Class IX of a school : Represent this data in a frequency distribution table

KUMAR PRAKASHAN-STATISTICS-SKILL TESTING EXERCISE
  1. The marks scored by 40 students in a Mathematics test are given below:...

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  2. The weights (in kg) of 30 girls of Primestreet Society are as below: ...

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  3. The marks scored by 40 students in a 60 mark test of english are as fo...

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  4. The information on the height (in cm) of 30 children is given below : ...

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  5. The following data on the number of girls (to the nearest ten) per tho...

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  6. Draw a histogram for the frequency distribution :

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  7. 100 surnames were randomly picked up from a local telephone directory ...

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  8. Draw a frequency polygon for the following frequency distribution :

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  9. The weight (in kg) of seven students are given below: 35, 30, 42, 36, ...

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  10. The information regarding the marks scored by 30 students in a 20 mark...

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  11. The height (in cm) of 100 students of a school are tabulated below: ...

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  12. Find the median of the observations 13, 9, 15, 8, 6, 3.

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  13. Find the median of the observations 12, 41, 34, 26. 31, 22, 10.

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  14. Find the mode of the observations 17, 10, 13, 18, 22, 13, 26, 9, 13, 1...

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  15. Find the mode of the observations 25, 20, 16, 12, 20, 16, 19, 23, 31, ...

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  16. Find the mean, the median and the mode of the observations 24, 12, 15,...

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  17. Some observations are arranged in the ascending order as 9, a +3, a +7...

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  18. The mean of 5 observations is 20. Including one new observation, the m...

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  19. The mean of 10 observations is 28. If 2 is added to each observation a...

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  20. Find the mean of the following frequency distribution:

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