Find the median weight of the students. To find the class mark, the following relation is used. If the median of the distribution given below is 28. Number of mangoes 50 — 52 53 — 55 56 — 58 59 — 61 62 — 64 Number of boxes 15 110 135 115 25 Find the mean number of mangoes kept in a packing box. Therefore, mean of the data is 29. Find the modal monthly expenditure of the families.
Answer : To find the class mark for each interval, the following relation is used. The weightage of this chapter in the final exam is around 11 to 12 marks. 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? Find the mean number of plants per house. Answer : The cumulative frequency distribution of more than type can be obtained as follows. First we obtain the class marks as given in the following table : We represent class marks on x-axis on a suitable scale and frequencies on y-axis on a suitable scale. Hence obtain the median weight from the graph verify the result by using the formula.
T have a teacher-student ratio as 30. Q5 : Find the following table gives the distribution of the life time of 400 neon lamps: Life time in hours Number of lamps 1500 — 2000 14 2000 — 2500 56 2500 — 3000 60 3000 — 3500 86 3500 — 4000 74 4000 — 4500 62 4500 — 5000 48 Find the median life time of a lamp. Q3 : A life insurance agent found the following data for distribution of ages of 100 policy holders. Scale chosen: On y-axis: 1 large division, i. Detailed answers of all the questions in Chapter 14 Maths Class 10 Statistics Exercise 14. Answer Since, the given data is not continuous so we add 0.
It can be observed that the difference between two consecutive upper class limits is 2. Now, we draw rectangles with the class intervals as bases and the corresponding adjusted frequencies as the heights. There are a number of methods you will learn from this chapter such as, step deviation methods, finding mode and median of grouped data, converting frequency distribution and the relation between, mode, mean and median methods, etc. For Median: Here, , then , which lies in interval 125 — 145. In the given frequency distribution, we see that the class-sizes are different.
Ncert solution class 10 Maths includes text book solutions from Mathematics Book. Answer : Number of mangoes Number of boxes f i 50 — 52 15 53 — 55 110 56 — 58 135 59 — 61 115 62 — 64 25 It can be observed that class intervals are not continuous. Fine the mean heart beats per minute for these women, choosing a suitable method. Answer : The cumulative frequencies with their respective class intervals are as follows. The required histogram is as shown : Q. Find the missing frequency f.
These boxes contained varying number of mangoes. Students can also get here exercise-wise. In a retail market, fruit vendors were selling mangoes kept in packing boxes. To obtain the frequency polygon of section A, we plot the points 5, 3 , 15, 9 , 25, 17 , 35, 12 and 45, 9 , and join these points by line segments. The following table gives the life times of 400 neon lamps: i Represent the given information with the help of a histogram. Find the mean number of days a student was absent. You will face many real-life scenarios where the fundamentals of statistics are used to represent a set of data in tabular form or in graphs or in pie charts.
Find the median life time of the lamps. We also observe that the number of girls in each section are less than the boys. Here the classes are not of equal size. Here, , then , also, median of the distribution is 28. The required graph is as follows : ii Party A won the maximum number of seats.
The Solutions for chapter Statistics are prepared by our experts who have done specialization in Maths. For Median: Here, , then , which lies in interval 7 — 10. It can be observed that the difference between two class intervals is 1. Therefore, class intervals with their respective cumulative frequency can be defined as below. The following table shows the ages of the patients admitted in a hospital during a year: Age in years 5-15 15-25 25-35 35-45 45-55 55-65 Number of patients 6 11 21 23 14 5 Find the mode and the mean of the data given above.
In the , we learned how to find mean, median, mode of raw and ungrouped data. Q5 : In a retail market, fruit vendors were selling mangoes kept in packing boxes. Taking 17 as assumed mean a , d i, u i, f iu i are calculated as follows. Given that, mean pocket allowance, Taking 18 as assured mean a , d i and fidi are calculated as follows. A class teacher has the following absentee record of 40 students of a class for the whole term. Also, find the mean monthly expenditure.