The blood groups of 30 students of Class VIII are recorded as follows:
A,B,O,O,AB,O,A O,B,A,O,B, A,O,O,
A,AB,O,A,A,O,O,AB,B,A,O,B,A,B.O.
Represent this data in the form of a frequency distribution table. Which is the most common and which is the rarest, blood group among these students.

O is the most common and AB is the rarest blood group among these students.

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Give five examples of data that you can collect from your day-to-day life.

Classify the data in Q. 1 above as primary or secondary data.

The distance (in km) of 40 engineers from their residence to their place of work were found as follows:

5 3 10 20 25 11 13 7 12 31
19 10 12 17 18 11 32 17 16 2
7 9 7 8 3 5 12 15 18 3
12 14 2 9 6 15 15 7 6 12

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 ?

The relative humidity (in %) of a certain city for a month of 30 days is as follows:

98.1 98.6 99.2 90.3 86.5 95.3 92.9 96.3 94.2 95.1

89.2 92.3 97.1 93.5 92.7 95.1 97.2 93.3 95.2 97.3

96.2 92.1 84.9 90.2 95.7 98.3 97.3 96.1 92.1 89

(i) Construct a grouped frequency distribution table with classes 84-86, 86-88, etc.
(ii) Which month or season do you think this data is about?
(iii) What is the range of this data?

Statistics

The blood groups of 30 students of Class VIII are recorded as follows:A,B,O,O,AB,O,A O,B,A,O,B, A,O,O,A,AB,O,A,A,O,O,AB,B,A,O,B,A,B.O.Represent this data in the form of a frequency distribution table. Which is the most common and which is the rarest, blood group among these students.

The blood groups of 30 students of Class VIII are recorded as follows:
A,B,O,O,AB,O,A O,B,A,O,B, A,O,O,
A,AB,O,A,A,O,O,AB,B,A,O,B,A,B.O.
Represent this data in the form of a frequency distribution table. Which is the most common and which is the rarest, blood group among these students.