Ex 14.1, 4 - Thirty women were examined in a hospital by

Ex 14.1, 4 - Chapter 14 Class 10 Statistics - Part 2
Ex 14.1, 4 - Chapter 14 Class 10 Statistics - Part 3

  1. Chapter 14 Class 10 Statistics (Term 2)
  2. Serial order wise

Transcript

Ex 14.1, 4 Thirty women were examined in a hospital by a doctor and the number of heart beats per minute were recorded and summarized as follows. Fine the mean heart beats per minute for these women, choosing a suitable method. Mean(๐‘ฅ ฬ…) = a + h ร— (โˆ‘โ–’๐’‡๐’Š๐’–๐’Š)/(โˆ‘โ–’๐’‡๐’Š) Where a = Assumed mean h = Class interval = 75.5 = 68 โ€“ 65 = 3 Also, โˆ‘โ–’๐’‡๐’Š = 30 โˆ‘โ–’๐’‡๐’Š๐’–๐’Š = 4 Putting values in formula Mean(๐’™ ฬ…) = a + h ร— (โˆ‘โ–’๐’‡๐’Š๐’–๐’Š)/(โˆ‘โ–’๐’‡๐’Š) ๐‘ฅ ฬ… = 75.5 + 3 ร— 4/30 ๐‘ฅ ฬ… = 75.5 + 0.4 ๐’™ ฬ… = 75.9 Thus, Mean heartbeats per minute is 75.9

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Davneet Singh
Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 10 years. He provides courses for Maths and Science at Teachoo.