Exercise Ex A survey was conducted by a group of students as a part of their environment awareness programme, in class 8 maths ch 10 ex 10.1 quote they collected the following data regarding the number of plants in 20 houses in a locality. Find the mean number of plants per house.
Which method did you use for finding the mean, and why? You can also download the free PDF of Ex Consider the following distribution of daily wages of 50 workers of a factory. Find the mean daily wages of the workers of the factory by using an appropriate method. The following distribution shows coass daily pocket allowance of children of a locality.
Find the missing frequency f. Thirty women were examined in a hospital by a doctor and the number of heart beats per minute were recorded and summarised as follows. Find cch mean heart beats per minute for these women, choosing a suitable method Solution:. In a retail market, fruit vendors were selling mangoes kept in packing boxes. These boxes contained varying number of mangoes. The following was the distribution of mangoes according to the number of boxes.
Find the mean number of mangoes kept in a packing box. Which method of finding the mean did you choose?
The table below shows the daily expenditure on food of 25 households in a locality. Find the mean daily expenditure on food by a suitable method. To find out the concentration of SO2 in the air in parts per million, i. A class teacher has the following absentee record of 40 students of a class for the whole term.
Find maaths mean number of days a student was absent. The following table gives the literacy rate in percentage of 35 cities. Find the mean literacy rate.
Class limits : Suppose mark obtained by all of the students are divided into class intervals 25 � 35, 35 � 45 and so interval on. In class interval 25 � 35, 25 is called lower class limit and 35 is called upper class limit.
Class size : The difference between upper and lower class limit. Class mark : It is given by. The data obtained in original form are called raw data or ungrouped data. To put the data in a more condensed form, we make groups of suitable size, and mention the frequency of each group. Such a table is called grouped data.
The class with the maximum frequency is called modal class. Median is a measure of central tendency which gives the value of the middle-most observation in the data.
The curve so obtained is called a cumulative frequency curve, or an ogive of the less than type. The curve so obtained is called a cumulative frequency curve, or an ogive of the more than type. The two matths will intersect class 8 maths ch 10 ex 10.1 quote other at mxths point.
From this point, if we draw a perpendicular on the x-axis, the point at which it class 8 maths ch 10 ex 10.1 quote the x-axis gives us the median. From this point on y-axis, draw a line parallel to x-axis cutting Class 7 Maths Ch 10 Ex 10.1 Java the less than ogive at a point. From this point draw a perpendicular on the x-axis, the mathe at which the perpendicular cuts the x-axis gives us the median. Solution: Ex Find the mean heart beats per minute for these women, choosing a suitable method Solution: Ex Solution: Class 10 Maths Statistics Mind Maps Basic Terms Class limits : Suppose mark obtained claws all of the students are divided into class intervals 25 � 35, 35 � 45 and so interval on.
Class mark : It is given by Ungrouped and Grouped Data The data obtained in Class 10 Ch 12 Maths In Hindi Quote original form are called raw data or ungrouped data. Median Median class 8 maths ch 10 ex 10.1 quote a measure of central tendency which gives the value of the middle-most observation in the data. Median by Graph i Draw the ogive of the less than type and ogive of the more than type on the same axis.
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