In a case of 40 students, marks obtained by the students in a class test (out of 10) are given below:
|Number of students||1||2||3||3||6||10||5||4||3||3|
Calculate the following for the given distribution:
The data on the number of patients attending a hospital in a month are given below. Find the average (mean) number of patients attending the hospital in a month by using the shortcut method. Take the assumed mean as 45. Give your answer correct to 2 decimal places.
|Number of patients||10 - 20||20 - 30||30 - 40||40 - 50||50 - 60||60 - 70|
|Number of Days||5||2||7||9||2||5|
The following are the marks obtained by 70 boys in a class test:
|Marks||No. of boys|
Calculate the mean by :
Step - deviation method
Attempt this question on a graph paper. The table shows the distribution of marks gained by a group of 400 students in an examination.
Marks (Less than )
Using scaie of 2cm to represent 10 marks and 2 cm to represent 50 student, plot these point and draw a smooth curve though the point
Estimate from the graph :
(1)the midian marks
(2)the quartile marks