Question

271
4. Thirty women were examined in a hospital by a doctor and the number of heartbeats per
minute were recorded and summarised as follows. Find the mean heartbeats per minute
for these women, choosing a suitable method.
Number of heartbeats 65-68 68-71 71-74 74-7777-80 80-83 83-86
)
per minute
Number of women
2
4
3
8
7
4
2.​

Answer 1

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