Question

How to calculate on excel?

42. Your laboratory manager is comparing two different methods to analyze D plasma concentrations. He uses a NIST reference standard that has a certified concentration of 35 mg/dL. Calculate the bias for both methods. Using an F-test determine if the precision is equal for the two methods. Which method is more precise? Which method is more accurate?LO III.2 & LO III.4 n Method А B Mean (mg/dL) standard deviation 34.2 1.8 36.21 0.6 14 18 Reference material used = 35 mg/dL

Answer 1

ANSWER :
Given that the uses of NIST reference standard that has اے certified concentration of 35 mal and the using anf-test determine if the precision is equal for the two methods well and alternative hypothesis? 146 :51 = 62 141 6 & 62 test statistici F = 32/3; 2 = 182/06² 2 9.0000 degree freedom. - 13 def, ni-1 a f = na- hz-1 =.17 coritical value (s) lowe or tailed critical value, FLOf IN vb.512,517) : 0. 33 329,

uppen tailed critical value fui - finu C1-0.05 05 12, 13, 17) 2.78 63 P valve 2xF.DIST. 52T (4113, 17) 2- 0.000) conclusion ASP-value La, we reject the null hypothesis Precision is not equal for both Method is is more precise method B! Ho u = 35 Ho: Ms 35 (Right fail test) Level of significance da 6:05 sample std den 20 6000 Sample size n 18 Sample Mean Ix 36 2000

degree of freedom DF en-1 - 18-1 17 standard error SE slun 0.600 Iris o.1414 t-test statistic = (j .M) 136 (36 200-55) 10.1414 8:49 P-walbe [excel formula at dish (to stafa -okty] decision : thesis Prvalueza, Reject noul hyrs lkt: method A is more accurate