Mathematics
Calculate the mean of the following distribution using step deviation method :
| Marks | Number of students |
|---|---|
| 0 - 10 | 10 |
| 10 - 20 | 9 |
| 20 - 30 | 25 |
| 30 - 40 | 30 |
| 40 - 50 | 16 |
| 50 - 60 | 10 |
Related Questions
Calculate the mean of the following distribution:
Class interval Frequency 5 - 15 2 15 - 25 6 25 - 35 4 35 - 45 8 45 - 55 4 Calculate the mean of the following distribution :
Class interval Frequency 0 - 10 8 10 - 20 5 20 - 30 12 30 - 40 35 40 - 50 24 50 - 60 16 The data on the number of patients attending a hospital in a month is given below. Find the average (mean) number of patients attending the hospital in a month using the short cut method.
Take assumed mean as 45. Give your answer correct to 2 decimal places.
Number of patients Number of days 10 - 20 5 20 - 30 2 30 - 40 7 40 - 50 9 50 - 60 2 60 - 70 5 The following table keep the daily wages of worker in a factory
Wages in ₹ No. of workers 450 - 500 5 500 - 550 8 550 - 600 30 600 - 650 25 650 - 700 14 700 - 750 12 750 - 800 6 Calculate the mean by short cut method.