8类RD Sharma解决方案–第24章数据处理II(数据以直方图的图形表示)–练习24.1 |套装1

问题1.下面给出的是班级50名学生的身高频率分布：

Class Interval	140 – 145	145 – 150	150 – 155	155 – 160	160 – 165
Frequency	8	12	18	10	5

绘制表示上述数据的直方图。

解决方案：

To draw a histogram first construct x-axis and y-axis, where the x-axis represents class interval and the y-axis represents the frequency. Now, by taking suitable intervals from the given frequency table, we construct the rectangles as shown in the below figure. 

问题2.绘制以下数据的直方图：

Class Interval	10 – 15	15 – 20	20 – 25	25 – 30	30 – 35	35 – 40
Frequency	30	98	80	58	29	50

解决方案：

To draw a histogram first construct x-axis and y-axis, where the x-axis represents class interval and the y-axis represents the frequency. Now, by taking suitable intervals from the given frequency table, we construct the rectangles as shown in the below figure. 

问题3.过去五年中，学校在不同地区举办的研讨会数量如下：

Years	No. of Workshops
1995 – 1996	25
1996 – 1997	30
1997 – 1998	42
1998 – 1999	50
1999 – 2000	65

绘制表示上述数据的直方图。

解决方案：

To draw a histogram first construct x-axis and y-axis, where the x-axis represents class interval and the y-axis represents the frequency. Now, by taking suitable intervals from the given frequency table, we construct the rectangles as shown in the below figure. 

问题4.在一个假设的20个人的样本中，与他们的在一起的金额被发现如下：

114、108、100、98、101、109、117、119、126、131、136、143、156、168、182、195、207、219、235、118。

绘制频率分布的直方图(将类别间隔之一作为50-100)。

解决方案：

First we create a frequency table using the given observations:

Now we draw a histogram using the frequency table:

To draw a histogram first construct x-axis and y-axis, where the x-axis represents class interval and the y-axis represents the frequency. Now, by taking suitable intervals from the given frequency table, we construct the rectangles as shown in the below figure. 

问题5.为以下数据构建直方图：

Class Interval	Frequency
50 – 100	2
100 – 150	11
150 – 200	4
200 – 250	3

解决方案：

To draw a histogram first construct x-axis and y-axis, where the x-axis represents monthly school fee(in Rs) and y-axis represents the no. of schools. Now, by taking suitable intervals from the given frequency table, we construct the rectangles as shown in the below figure. 

问题6.在下表中绘制30家药店的每日收入的直方图：

Monthly School Fee(in Rs)	30-60	60-90	90-120	120-150	150-180	180-210	210-240
No. of Schools	5	12	14	18	10	9	4

解决方案：

To draw a histogram first construct x-axis and y-axis, where x-axis represents monthly daily earnings(in Rs) and y-axis represents the no. of stores. Now, by taking suitable intervals from the given frequency table, we construct the rectangles as shown in the below figure. 

第24章数据处理II(数据以直方图的图形表示形式)–练习24.1 |套装2