Question

Q-1 (7.4). The illegal traffic of rhinoceros horns is fueled by a huge demand in Asia where it is believed to have cancer-curing properties. The cost of rhino horn is estimated at $65,000 per kilogram on the black market. It is believed that there are no more than 11,000 white rhinos in the wild. In 2014, a record number of 1,020 rhinos have been poached in South Africa, most of them in the Kruger National Park, critically endangering this population. The following data gives the weight (in kg) for a sample of n = 18 white rhino horns: 1.1 2.9 1.3 2.1 2.3 1.3 2.2 1.6 1.5 2.0 3.1 1.6 2.4 1.8 2.7 3.0 0.9 2.1 (a) Find the mean and the standard deviation for the dataset. (b) Find the median, the first quartile, the third quartile and the IQR for this dataset. (c) Are there any outliers in this dataset?

Answer 1

Answers Given that The following da qivy the weight Ciokg) full a sample of 7-18 white rhino horns. 1.) 2.1 13 2.0 3.1 1.6 2.3 1.3 2.2 1.8 27 30 1.6 1.5 0.9 2.1 cas from the given dia mean (T) = sau 51.99 deviation (s) ) {(xi-tj2 standard and deviation (srl - s= {(ai-1.9992 - 18-1 S = 0.66. (6) for median, first arrange data is increasing sdu then medias is 272.1 22.05 first quartile (Q.) = 1.5 cic from above median find median, Third reedtile (Q3) = 2.4 cie from below the median, food median] Upper helt 0:9,1.1,1.3, 1.3,15,116,1.6, 1.8, 2, 2.1, 2.1, 2.2, 2.3,2.4, 2.7,2.9,3,3-1 Q3. Medion = 242.) – 2.05 dowel hilt Scanned with CamScanner

IQR - Q2-Q, = 2.4-1.5 = 0.9 C for outliers 1.5*IQR = 1.5*0.9 = 1.35 so if any value smaller than Q -1.5* IQR of langer than Q3 +1.54 IQR as cuttier. i-e 1.5-1.35 20.5 ,2.471.35 3.95 There is no ledue smaller than 0.5 and larger than 3.75 So there is no outliel. Scanned with CamScanner

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