Question

During a medical check-up, the number of heartbeats per minute of 30 patients was recorded and summarised as follows. Draw a "less than type" ogive for the given data and hence obtain the median from the graph. Verify the result using the median formula: | Number of heartbeats per minute | 65–68 | 68–71 | 71–74 | 74–77 | 77–80 | 80–83 | 83–86 | | Number of patients | 2 | 4 | 3 | 8 | 7 | 4 | 2 |

The annual profits earned by 30 shops of a shopping complex in a locality give rise to the following distribution. Draw both the "more than type" ogive and the "less than type" ogive, and hence find the median profit: | Profit (₹ lakh) | More than or equal to 5 | More than or equal to 10 | More than or equal to 15 | More than or equal to 20 | More than or equal to 25 | More than or equal to 30 | More than or equal to 35 | | Number of shops | 30 | 28 | 16 | 14 | 10 | 7 | 3 |

The given graph represents the monthly salaries (in ₹) of workers of a factory. Using graph answer the following:

Use graph paper to answer this question. During a medical checkup of 60 students in a school, weights were recorded as follows: Weight (in kg) | Number of Students 28 – 30 | 2 30 – 32 | 4 32 – 34 | 10 34 – 36 | 13 36 – 38 | 15 38 – 40 | 9 40 – 42 | 5 42 – 44 | 2 Taking 2 cm = 2 kg along one axis and 2 cm = 10 students along the other axis draw an ogive. Use your graph to find the: