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Solution - Presentation of Data

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Question

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

53102025111371231
1910121718113217162
7978351215183
121429615157612

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?

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Similar questions

Thirty children were asked about the number of hours they watched TV programmes in the previous week. The results were found as follows:-

16235125848
10341228151176
328596871412

(i) Make a grouped frequency distribution table for this data, taking class width 5 and one of the class intervals as 5 - 10.

(ii) How many children watched television for 15 or more hours a week?

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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:-

0.030.080.080.090.040.17
0.160.050.020.060.180.20
0.110.080.120.130.220.07
0.080.010.100.060.090.18
0.110.070.050.070.010.04

(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?

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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?

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The heights of 50 students, measured to the nearest centimeters, have been found to be as follows:-

161150154165168161154162150151
162164171165158154156172160170
153159161170162165166168165164
154152153156158162160161173166
161159162167168159158153154159

(i) Represent the data given above by a grouped frequency distribution table, taking the class intervals as 160 - 165, 165 - 170, etc.

(ii) What can you conclude bout their heights from the table?

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The value of π up to50 decimal places is given below:-

3.14159265358979323846264338327950288419716939937510

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