STATISTICS ONE

Exercise No. 5.1

1. Below is given distribution of money (in Rs.) collected by students for flood relief fund. Find mean of money (in Rs. ) collected by a student by 'Direct Method'.

 

2. Following table gives age distribution of people sufering from 'Asthma due to air pollution in certain city. Find mean age of persons suffering from 'Asthma' by 'Direct Method'.

 

3. The measurements (in mm) of the diameters of the head of screws are given below: Calculate mean diameter of head of a screw of 'Assumed Mean Method'.

 

4. Below is given frequency distribution of marks (out of 100) obtained by the students. Calculate mean marks scored by a student by 'Assumed Mean Method'.

 

5. Following table gives frequency distribution of milk (in litres) given per week by 50 cows. Find average (mean) amount of milk given by a cow by 'Shift of Origin Method.'

6. Following table given frequency distribution of trees planted by different housing societies in a particular locality. Find the number of trees planted by housing society by using 'step deviation method'.

7. Following table gives age distribution of people suffering from 'Asthma due to air pollution in certain city. Find mean by 'Step Deviation method'.

8. The measurements (in mm) of the diameters of the head of screws are given below: Find mean by 'Step deviation method'.

9. Solve by 'Assumed Mean method. Following table gives frequency distribution of trees planted by different housing societies in a particular locality;. Find Mean.

10. Solve by 'Step Deviation Method. Below is the frequency distribution of marks (out of 100) obtained by the students. Find mean.

Exercise No. 5.2 

1. Following is the distribution of the size of certain farms from a taluka (tehasil):

2. Below is given distribution of profit in Rs. per day of a shop in certain town: Calculate median profit of a shop.

3. Following table shows distribution of monthly expenditure (in Rs.) done by households in a certain village on electricity: Find median expenditure done by a household on electricity per month.

4. The following table shows ages of 300 patients getting medical treatment in a hospital on a particular day. Find median age of a patient.

Exercise No. 5.3

1. The weight of coffee (in gms) in 70 packets is given below: Determine the modal weight of coffee in a packet.

2. Forty persons were examined for their Hemoglobin % in blood (in mg per 100 ml) and the results were grouped as below: Determine modal value of Hemoglobin % in blood of a person.

3. The maximum bowling speed (Kms/hour) of 33 players at a cricket coaching centre is given below.

4. The following table shows frequency distribution of body weight (in gms) of fish in a pond. Find modal body weight of a fish in a pond.

Exercise No. 5.4

1. For a certain frequency distribution the values of Mean and Mode are 54.6 and 54 respectively. Find the value of median.

2. For a certain frequency distribution the values of Median and Mode is 95.75 and 95.5 respectively, find the mean.

3. For a certain frequency distribution the value of Mean is 101 and Median is 100. Find the value of Mode.