Question

4-15. Students at the University of North Dakota measured visible light absorbance of food colorings. Replicate measure- wavelength of 502 nm gave the following values: 0.189, 0.169, 0.187, 0.183, 0.186, 0.182, 0.181, 0.184, 0.181, and 0.177. Identify the ments of a solution of the drink Kool-Aid at a outlier and decide whether to exclude it from the data set.

Answer 1

Glauleting the standard deviation of the date. D = 0.169 +0.169 +0.187 +01163+0.186 +0.182+2 xolla +0.177+0.184 o = 0.1819 Õ = 0.1819 Co.189 -0.1819) to +(01184011810) n-1 6 = 0.005686 6 = 0.0057 D'= 0 +5. Dimen = 0.1619 - 010057= 0,176 D = 0 | /3 + 01 vo57 = 0 | 876 Omex = 0.186 by 01176 to all 86 0,189 h 0.169 because there there are the 189 h0.169 because the outside so, out his are standard deviction, a