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The table below gives the rainfall during one week of September 2015 in various districts of Kerala.DistrictRainfall (mm)Kasaragod66.7Kannur56.9Kozhikode33-5Wayanad20.5Malappuram13-5Palakkad56.9Thrissur53-4Ernakulam70.6Kottayam50.3Idukki30.5Pathanamthitta56.4Alapuzha45-5Kollam56.3Thiruvananthapuram89.0Calculate the mean and median rainfall in Kerala during this week. Why is the mean less than median? |
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Answer» Mean = Total amount of rain / No. of districts = 700/14 = 50 In ascending order: 13.5, 20.5, 30.5, 33.5, 45.5, 50.3, 53.4, 56.3, 56.4, 56.9, 56.9, 66.7, 70.6, 89 Median = \(\cfrac{53.4+56.3}{2}\) = 54.85 The mean is less than median because the number contains are far small and large numbers than mean. |
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