SHON IN ASK YOUR TEACHER PRACTICE ANOTHER In a study on the effect of an oral rinse on blaque bulidup on teeth, steen people whose teeth were thoroughly cleened and polshed were randomly assigned to two groups of eght sutjects each Both groups were assigned to use oral rinses (no brushing) for a 2-week period. Group 1 used a rinse that contained an antiplaque agent. Group 2, the control group, received a similar rede except that the rinse contained no antiplaque agent. A measure of plague buldup was recorded at 14 days with means and standard deviations for the two groups shown in the table Contrel Group Antiplaque Group Sample Sire Hean 1.27 0.72 Standard Deviation 0.39 0.35 A USE SALT (a) State the null and alternative hypetheses that should be used to test the effectiveness of the antiplaque oral rinse. O Ma: (-)-o versus , (, -,) 0 O Hg Cmy- ) O versus H, , - ) -0 OMoi - ) 0 Hgi C-)-o versus -) > 0 O Mo: C -) - o versus , (-) < o (1) De the data provide sufficient evidence to indicate that the ori antplaue nnse is effective Test using e0.os State the test statistic. (Round your answer to three decimal piaces.) State the rejection region. (If the test is one-taled, enter NONE for the unused region. Round your enewers to three decimal places.) State the concusion OHs not rejected. There is insufficient evidence to conclude that the aral antiplaque ise is effective OH, is not rejected. There is ssuffioent evidence to conclude that the oral antplaque rise is effective
SHON IN ASK YOUR TEACHER PRACTICE ANOTHER In a study on the effect of an oral rinse on blaque bulidup on teeth, steen people whose teeth were thoroughly cleened and polshed were randomly assigned to two groups of eght sutjects each Both groups were assigned to use oral rinses (no brushing) for a 2-week period. Group 1 used a rinse that contained an antiplaque agent. Group 2, the control group, received a similar rede except that the rinse contained no antiplaque agent. A measure of plague buldup was recorded at 14 days with means and standard deviations for the two groups shown in the table Contrel Group Antiplaque Group Sample Sire Hean 1.27 0.72 Standard Deviation 0.39 0.35 A USE SALT (a) State the null and alternative hypetheses that should be used to test the effectiveness of the antiplaque oral rinse. O Ma: (-)-o versus , (, -,) 0 O Hg Cmy- ) O versus H, , - ) -0 OMoi - ) 0 Hgi C-)-o versus -) > 0 O Mo: C -) - o versus , (-) < o (1) De the data provide sufficient evidence to indicate that the ori antplaue nnse is effective Test using e0.os State the test statistic. (Round your answer to three decimal piaces.) State the rejection region. (If the test is one-taled, enter NONE for the unused region. Round your enewers to three decimal places.) State the concusion OHs not rejected. There is insufficient evidence to conclude that the aral antiplaque ise is effective OH, is not rejected. There is ssuffioent evidence to conclude that the oral antplaque rise is effective
Holt Mcdougal Larson Pre-algebra: Student Edition 2012
1st Edition
ISBN:9780547587776
Author:HOLT MCDOUGAL
Publisher:HOLT MCDOUGAL
Chapter11: Data Analysis And Probability
Section11.4: Collecting Data
Problem 3E
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Transcribed Image 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 -) <o versus H ( -) >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
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