Question

QUESTION 14 In an analysis of Variance (ANOVA), we have the following summary information. Calculate the value of the F test statistic. s= 25, 52 = 37, s} = 28,. .-= number in each sample = 15 and 5-14 O F=0.14 OF=7 OF=210 OF=30 QUESTION 15 Suppose an Analysis of Variance (ANOVA) has determined that there is a difference between means and the following Tukey's results are shown. Determne which mean is different. Comparison Lower upper A Compared to B 3.15 6.28 A Compared to C - 1.47 -0.51 Compared to -0.21 4.17 O Mean A is different than B&C O Mean Bis different than A&C O Mean is different than A&B O No evidence any means are different

Answer 1

14)here due to equal size :

MS(error )=(s1²+s2²+s3²)/3 =(25+37+28)/3 =30

MS(treatment)=n*Sx² =15*14

therefore F =15*14/30 =7

15)

since interval for A and B as well A and C ; does not contain 0;

Mean A is different than B&C