# Statistics

### The following frequency distribution shows the distance thrown by 68 students

The following frequency distribution shows the distance (in metres) thrown by 68 students in a Javelin throw competition. Draw a less than type Ogive for the given data and find the median distance thrown using this curve.

### The following distribution shows the daily pocket allowance of children of a locality

The following distribution shows the daily pocket allowance of children of a locality. The mean pocket allowance is Rs.18. Find the missing frequency k. ### By changing the following frequency distribution ‘to less than type’

By changing the following frequency distribution ‘to less than type’ distribution, draw its ogive. ### Find the mean and mode for the following data

Find the mean and mode for the following data: ### The table below shows the salaries of 280 persons

The table below shows the salaries of 280 persons:

 Salary (In thousand Rs.) No. of persons 5-10 49 10-15 133 15-20 63 20-25 15 25-30 6 30-35 7 35-40 4 40-45 2 45-50 1

Calculate the median salary of the data.

### The mean of the following distribution is 18. Find the frequency f of the class 19 - 21

The mean of the following distribution is 18. Find the frequency f of the class 19 - 21.

 Class 11-13 13-15 15-17 17-19 19-21 21-23 23-25 Frequency 3 6 9 13 f 5 4

### The following distribution gives the daily income of 50 workers of a factory

The following distribution gives the daily income of 50 workers of a factory.

 Daily income (in Rs.) 100-120 120-140 140-160 160-180 180-200 Number of workers 12 14 8 6 10

Convert the distribution above to a less than type cumulative frequency distribution, and draw its ogive.

### Find the mode of the following distribution of marks obtained by the students

Find the mode of the following distribution of marks obtained by the students in an examination: Given the mean of the above distribution is 53, using empirical relationship estimate the value of its median.