Ncert solutions for class 10 maths chapter statistics exercise 14.4
Rating:
8,1/10
154
reviews

Find the mean literacy rate. What main features do you observe from this tabular representation? Solution: Production yield Cumulative frequency More than 50 100 More than 55 98 More than 60 90 More than 65 78 More than 70 54 More than 75 16. Answer The frequency means the number of students having same blood group. See also the other exercises or or or Solutions. The lives in years of 40 such batteries were recorded as follows: 2. Represent the data of both the teams on the same graph by frequency polygons.

Let us now plot the points corresponding to the ordered pairs given by 38, 0 , 40, 3 , 42, 5 , 44, 9 , 46, 14 , 48, 28 , 50, 32 and 52, 35 on a graph paper an join them by a free hand smooth curve. The mean pocket allowance is Rs. These are helpful for students, to do the revision at the time of exam and also to score well. Consider the following distribution of daily wages of 50 workers of a factory. Go back to main page or move to of the page. In this case it is 46.

Ans : i By the observation of the digits after decimal point, the required table can be constructed as follows. The table below shows the daily expenditure on food of 25 households in a locality. Answer Modal class of the given data is 60—80. A student noted the number of cars passing through a spot on a road for 100 periods each of 3 minutes and summarized it in the table given below. Hint: The data needs to be converted to continuous classes for finding the median, since the formula assumes continuous classes.

The following table gives the literacy rate in percentage of 35 cities. Find the modal monthly expenditure of the families. Which method of finding the mean did you choose? Classify the data in Q. Find the mean number of days a student was absent. Now, by drawing the points on the graph, i. Find the mode of the following data in each case: i 14, 25, 14, 28, 18, 17, 18, 14, 23, 22, 14, 18 ii 7, 9, 12, 13, 7, 12, 15, 7, 12, 7, 25, 18, 7 Ans.

Find the median weight of the students. Number of mangoes 50-52 53-55 56-58 89-61 62-64 Number of boxes 15 110 135 115 25 Find the mean number of mangoes kept in a packing box. The table below shows the daily expenditure on food of 25 households in a locality. Ans : i By taking life time in hours of neon lamps on x-axis and the number of lamps on y-axis, the histogram of the given information can be drawn as follows. This solution contains questions, answers, images, explanations of the complete Chapter 14 titled The Fun They Had of Maths taught in Class 10. Draw a perpendicular from this point on x-axis. Hence obtain the median weight from the graph and verify the result by using the formula.

Weights of students of our class. Therefore, the mode score of data is 3 as has the maximum frequency as 4 in the data. This extraction of useful or meaningful information is studied in the branch of mathematics called statistics. A survey was conducted by a group of students as a part of their environment awareness programme, in which they collected the following data regarding the number of plants in 20 houses in a locality. Convert the distribution above to a less than type cumulative frequency distribution, and draw its ogive.

Also, find the modal size of the surnames. By observing the data given above, the required table can be constructed as follows. Number of plants 0-2 2-4 4-6 6-8 8-10 10-12 12-14 Number of houses 1 2 1 5 6 2 3 Which method did you use for finding the mean, and why? In a retail market, fruit vendors were selling mangoes kept in packing boxes. Ans : It can be observed that 9 students have their blood group as A, 6 as B, 3 as Ad, and 12 as O. These are designed by our subject experts and hence the given the best solutions for all the exercise problems.

The following table gives distribution of the life time of 400 neon lamps. Lack of correct knowledge of treatment Ans : i By representing section variable on x-axis and number of girls per thousand boys on y-axis, the graph of the information given above can be constructed by choosing an appropriate scale 1 unit 100 girls for paxis Here, all the rectangle bars are of the same length and have equal spacing in between them. Solutions of class 10 all subjects, move here to. Answer i The data is represented in a discontinuous class interval. So, first we will make continuous. Now, draw the ogive by plotting the points 50, 100 , 55, 98 , 60, 90 , 65, 78 , 70, 54 and 75, 16 on this graph paper and join them by a free hand smooth curve. Consider the following distribution of daily wages of 50 workers of a factory.