Question

7. During a medical checkup, the number of heartbeats per minute of
40 patients were recorded and summarised as follows:
Number of heartbeats
64-68 68-72 72-76 76-80 80-84 84-88
per minute
Number of patients
6
8.
10
12
3
1
Find the mean heartbeats per minute for these patients.
[CBSE 2016]​

Answer 1

Step-by-step explanation:

Using Direct method, the given data is shown as follows: Thus, the mean heartbeats per minute for these patients is 75.9.Read more on Sarthaks.com - https://www.sarthaks.com/143798/during-medical-check-number-heartbeats-minute-patients-were-recorded-summarized-follows