Provide an appropriate response 17) A horticulturist wants to test the effective

Question

Provide an appropriate response 17) A horticulturist wants to test the effectiveness of four typs f egrowth rate of Bermada grass Sx sections of grass are randomly assigned to each of the four fertilizer types, and the rate of growth for each section is measured. An ANOVA F-est rejected the hypothesis of equal means. Each pair of means were then compared, and the95% cottence tervals ar"hown below A)1 v 2(-5267,3739 B) 1 vs. 3(-11.307,-2.909) C)1vs.4-11.476-3 260 D)2 vs 3(-9.999. -2688) E) 2 vs. 4-10.132-3.075) F)3 vs. 4(-3.224, 2 703) Which tests show a signiticant difference bet ween the mean A) A,F B) A...D.EF E) B.C.DE 18) An industrial psychologist is investigating the effects of work evirnment on emglayee attitudes 18) A group of 20 recently hired sales trainees were randomly assigned to one of four different "home rooms -five trainees per room. Each room is identical excegt for wal color. The four colars used were light green, light blue, gray and red. The psychologist wants to know whether room color has an etfect on attitude, and, if so, wants to compare the mean anitudes of the trainees assigned to the four room colors. At the end of the training program, the tude et eacana te**as measured on 60-pt scale (The lower the score, the poprer the attitudel The data was subjacted to a one-way analysis of variance. Give the null hy pothesis for the ANOVA Fnt show n the printout ONE-WAY ANOVA FOR ATTITUDE BY COLOR Ms WITHIN 16 TOTAL 19 1829.75 151.69475 A) Ho:x12 3-4.where the r's represent the room colers B) Ho Pgreen Pblue Poray Pred where the p's represent the proportion with the C) H0u1·92 . 3-94 . 5-where the represent attude means for the ith person in each D) HO green-rblue . "gray a Pred-where the represent mean amtudes for the four rooms corresponding atbitude 19) A certain H MO is attempting to show the benelits of managed care to an insurance company. The 19) H MO believes that certain types of doctors a more cost etteht thann 0ne theory is that Certification Level is an important factor in measuting the cost-effectiveness of ghysicians To investigate this, the H MO obtained independent andom samples of 25 physicians from each of the three certification levels-Board certified (C: Uncertified, band eligible (El and Uncertified, beand ineligible (l)- and recorded the Sotal per-member, per-month chages for each (a total 25 physicians) In order to compare the mean charges for the three groups, the data will be subjected to an analysis of variance Write the null hypothesis tested by the ANOVA B)H0 PC.PE..;

Explanation / Answer

17)

if 0 is not present is confidence interval, then there is significant difference

hence

B,C,D and E are correct

18)

option D) is correct

19)

option C) is correct

20) p-value = 0.0001 < 0.05

hence we reject the null

option C) is correct

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