NOTES ASR YOUR TEACHER PRACTICE ANOTHER In a study on the effect of an oral ninse on blaque bulidup on teeth, stxteen people whose teeth were thoroughly cleened and polished were randomly assigned to...

Extracted text: NOTES ASR YOUR TEACHER PRACTICE ANOTHER In a study on the effect of an oral ninse on blaque bulidup on teeth, stxteen people whose teeth were thoroughly cleened and polished were randomly assigned to two groups of eght subjects each Both groups wwere assigned to use oral rinses (no brushing) for a 2-week period. Group 1 used a rinse that contained an antipleque agent. Group 2, the control group, received a similar rirae ecept thet the rinse contained no antiplaque agent. A measure of plaque buildup was recorded at 14 days with means and standard deviations for the two groups thown in the table. Control Group Antiplaque Group Sample Sire Mean 1.27 0.72 Standard Deviation 0.39 0.39 A USE SALT (a) State the null and alternative hypotheses that should be used ta test the effectiveness of the antiplague oral rinse H (-) -O versus (,-)0 O Ho -H) 0 versus H -)-0 O Hoi Gr -) 0 Ho ( -)-o versus H -) >0 OHa: C, -) -o versus (,-) <0 (b) de the data provide sufmicient evidence to indicate that the oral antplaque rinse is effective test using 0.0s state the test statistic. (round your answer to three decimal places.) state the rejection region. (if the test is one-talled, enter none for the unused region, round your entwers to three decimal glaces.) state the concusion. ohis not rejected. there is insufficient evidence to conclude that the oral antiplaque rise effective oh is not rejected. there is sufficent evidence to conclude that the oral andiplaque rise is effective (b)="" de="" the="" data="" provide="" sufmicient="" evidence="" to="" indicate="" that="" the="" oral="" antplaque="" rinse="" is="" effective="" test="" using="" 0.0s="" state="" the="" test="" statistic.="" (round="" your="" answer="" to="" three="" decimal="" places.)="" state="" the="" rejection="" region.="" (if="" the="" test="" is="" one-talled,="" enter="" none="" for="" the="" unused="" region,="" round="" your="" entwers="" to="" three="" decimal="" glaces.)="" state="" the="" concusion.="" ohis="" not="" rejected.="" there="" is="" insufficient="" evidence="" to="" conclude="" that="" the="" oral="" antiplaque="" rise="" effective="" oh="" is="" not="" rejected.="" there="" is="" sufficent="" evidence="" to="" conclude="" that="" the="" oral="" andiplaque="" rise="" is="">