The distribution of heights (in cm) of 96 children is given below. Construct a histogram and a frequency polygon on the same axes.

Height (in cm): 124
to
128 128
to
132 132
to
136 136
to
140 140
to
144 144
to
148 148
to
152 152
to
156 156
to
160 160
to
164

No. of Children: 5 8 17 24 16 12 6 4 3 1

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Solution

To represent the given data by a histogram, we first draw horizontal and vertical axes. Let us consider that the horizontal and vertical axes represent the class-limits and the frequencies of the class-intervals respectively.

The given data is a continuous grouped frequency distribution with equal class-intervals. Construct rectangles with class-intervals as bases and respective frequencies as heights.
To draw the frequency polygon of the given data using histogram, obtain the mid-points of the upper horizontal side of each rectangle and then join these mid-points of the adjacent rectangles of the histogram by line segments. Obtain the mid-points of two class-intervals of 0 frequencies, i.e. on the horizontal axis, one adjacent to the first, on its left and one adjacent to the last, on its right. These class-intervals are known as imagined class-intervals. Complete the polygon by joining the mid-points of first and last class-intervals to the mid-points of imagined class-intervals adjacent to them. Let us take one vertical division is equal to 4.

The heights of the different rectangles are as following

1. The height of the rectangle corresponding to the class-interval 124-128 is big

divisions.

2. The height of the rectangle corresponding to the class-interval 128-132 is big divisions.

3. The height of the rectangle corresponding to the class-interval 132-136 is big

divisions.

4. The height of the rectangle corresponding to the class-interval 136-140 is big divisions.

5. The height of the rectangle corresponding to the class-interval 140-144 is big divisions.

6. The height of the rectangle corresponding to the class-interval 144-148 is big divisions.

7. The height of the rectangle corresponding to the class-interval 148-152 is big divisions.

8. The height of the rectangle corresponding to the class-interval 152-156 is big divisions.

9. The height of the rectangle corresponding to the class-interval 156-160 is big

divisions.

10. The height of the rectangle corresponding to the class-interval 160-164 is big

divisions.

The histogram and frequency polygon of the given data is the following:

Suggest Corrections

Similar questions

The distribution of heights (in cm) of 96 children is given below. Construct a histogram and a frequency polygon on the same axes.

$\begin{matrix} Height(in cm) & 124 & 128 & 132 & 136 & 140 & 144 & 148 & 152 & 156 & 160 t o & t o & t o & t o & t o & t o & t o & t o & t o & t o 128 & 132 & 136 & 140 & 144 & 148 & 152 & 156 & 160 & 164 No. of Children & 5 & 8 & 17 & 24 & 16 & 12 & 6 & 4 & 3 & 1 \end{matrix}$

Question 10
The distribution of heights (in cm) of 96 children is given below.
$\begin{matrix} H e i g h t (i n c m) & N u m b e r o f c h i l d r e n 124 - 128 & 5 128 - 132 & 8 132 - 136 & 17 136 - 140 & 24 140 - 144 & 16 144 - 148 & 12 148 - 152 & 6 152 - 156 & 4 156 - 160 & 3 160 - 164 & 1 \end{matrix}$
Draw a less than type cumulative frequency curve for this data and use it to compute median height of the children.

Question 10
The distribution of heights (in cm) of 96 children is given below.
$\begin{matrix} H e i g h t (i n c m) & N u m b e r o f c h i l d r e n 124 - 128 & 5 128 - 132 & 8 132 - 136 & 17 136 - 140 & 24 140 - 144 & 16 144 - 148 & 12 148 - 152 & 6 152 - 156 & 4 156 - 160 & 3 160 - 164 & 1 \end{matrix}$
Draw a less than type cumulative frequency curve for this data and use it to compute median height of the children.

Q. By taking classes

30 - 40, 40 - 50, 50 - 60, . . .

, construct a frequency table for the following data:

65, 34, 74, 49, 52, 35, 71, 55, 61, 40, 56, 38, 52, 56, 52, 33, 60, 35, 49, 37, 53, 50, 44, 30, 62, 50, 47, 45, 47, 50, 63, 61, 54, 58, 47, 64, 37, 38, 44, 42, 47, 55, 70, 33, 75, 49, 47, 30, 60, 69

Also, construct a combined histogram and frequency polygon for the distribution.

Q. The median of a given frequency distribution is found graphically with the help of

(a) Histogram
(b) Frequency curve
(c) Frequency polygon
(d) Ogive

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Height (in cm):	124 to 128	128 to 132	132 to 136	136 to 140	140 to 144	144 to 148	148 to 152	152 to 156	156 to 160	160 to 164
No. of Children:	5	8	17	24	16	12	6	4	3	1

The distribution of heights (in cm) of 96 children is given below. Construct a histogram and a frequency polygon on the same axes. Height (in cm): 124 to 128 128 to 132 132 to 136 136 to 140 140 to 144 144 to 148 148 to 152 152 to 156 156 to 160 160 to 164 No. of Children: 5 8 17 24 16 12 6 4 3 1

The distribution of heights (in cm) of 96 children is given below. Construct a histogram and a frequency polygon on the same axes.

Height (in cm): 124
to
128 128
to
132 132
to
136 136
to
140 140
to
144 144
to
148 148
to
152 152
to
156 156
to
160 160
to
164

No. of Children: 5 8 17 24 16 12 6 4 3 1