Thirty women were examined in a hospital by a doctor and the number of heart beats per minute were recorded and summarized as follows. The class intervals in the data is having varying width. Using step deviation method as the values of f i, d i are big and also, there is a common multiple between all d i. We know that the area of rectangle is proportional to the frequencies in the histogram. If two observations 6 and 9 are replaced by 8 and 14 respectively. Answer i The data with class interval 0. The following table gives production yield per hectare of wheat of 100 farms of a village.
The following table shows the ages of the patients admitted in a hospital during a year. Answer Modal class of the given data is 60—80. A box contains 90 discs which are numbered from 1 to 90. Students shall also discuss the concept of cumulative frequency, the cumulative frequency distribution and how to draw cumulative frequency curves, called ogives. Hanif wins if all the tosses give the same result i. One card is then picked up at random.
These boxes contained varying number of mangoes. This extraction of useful or meaningful information is studied in the branch of mathematics called statistics. Who has the better chance to get the number 25? Go back to main page or move to of the page. Find the mode and mean of this data. Find the mode and mean of this data.
Lifetime 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. He established the discipline of mathematical statistics. The lengths of 40 leaves of a plant are measured correct to the nearest millimeter, and the data obtained is represented in the following table: Length in mm Number of leaves 118-126 3 127-135 5 136-144 9 145-153 12 154-162 5 163-171 4 172-180 2 Find the median length of leaves. A life insurance agent found the following data for distribution of ages of 100 policy holders. Solution odal class of the given data is 60—80. It is already justified in i.
Find the median weight of a students. Find notes, question papers for various other subjects like Mathematics, Biology, Chemistry and many competitive exams as well. The topics covered in the chapter is given below Section Number Topic 14. Calculate the modal monthly expenses of the families. What is the probability that the fish taken out is a male fish? Hence obtain the median weight from the graph and verify the result by using the formula. He is notable for his breakthrough work along with R.
The following distribution gives the daily income of 50 workers of a factory. Go back to main page or move to of the page. Q2: Consider the following distribution of daily wages of 50 worker of a factory. Also, calculate the mean monthly expenses. The answer is right or wrong. The following was the distribution of mangoes according to the number of boxes.
A class teacher has the following absentee record of 40 students of a class for the whole term. Find the missing frequencies f1 and f2. Daily expenditure in Rs 100 - 150 150 - 200 200 - 250 250 - 300 300 - 350 Number of households 4 5 12 2 2 Find the mean daily expenditure on food by a suitable method. What is the probability that she takes out i an orange flavoured candy? If 2 is added to each number, what is the new mean? Find the mean literacy rate. Which of the following experiments have equally likely outcomes? The following data gives the information on the observed lifetimes in hours of 225 electrical components : Lifetime in hours 0-20 20-40 40-60 60-80 80-100 100-120 Frequency 10 35 52 61 38 29 Determine the modal lifetimes of the components.
. See the solutions of other chapters of or go to of the page. The other Exercises of this chapter like or or are here to view it online. The table below shows the daily expenditure on food of 25 households in a locality. See the solutions of other chapters of or go to of the page.