Many people have high anxiety about visiting the dentist. Researchers want to know if this affects blood pressure (B.P.) in such a way that the mean blood pressure whil waiting to see the dentist is higher than it is an hour after the visit. Ten individuals have their systolic blood pressure measured while they are in the dentist's waiting room and again an hour later after the conclusion of the visit to the dentist. The dat are as follow: RD ro: 122 125 140 122 110 121 129 122 110 110

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Chapter1: Combinatorial Analysis
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Many people have high anxiety about visiting the dentist. Researchers want to know
if this affects blood pressure (B.P.) in such a way that the mean blood pressure while
waiting to see the dentist is higher than it is an hour after the visit. Ten individuals
have their systolic blood pressure measured while they are in the dentist's waiting
room and again an hour later after the conclusion of the visit to the dentist. The data
are as follow:
B.P. Before: 132, 135, 149, 133, 119, 121, 128, 132, 119, 110
B.P. After: 118, 137, 140, 139, 107, 116, 122, 124, 115, 103
Assume normality if needed for this problem.
Let
Before
denote the true mean blood pressure while waiting to see the dentists, and
denote the true mean blood pressure after seeing the dentist.
After
The appropriate null and alternative hypothesis for testing the researcher's claim is
is HoμBefore
μBefore - μAfter #0
O is Ho: M Before
:
μBefore After > 0
O is Ho: M Before -
After ≤0 vs. Ha : Before
After > 0
is Ho : μBefore – µAfter ≤ 0 vs. Ha : μBefore – μAfter < 0
-
After = 0 vs. Ha
After ≥ 0 vs. Ha
-
Transcribed Image Text:Many people have high anxiety about visiting the dentist. Researchers want to know if this affects blood pressure (B.P.) in such a way that the mean blood pressure while waiting to see the dentist is higher than it is an hour after the visit. Ten individuals have their systolic blood pressure measured while they are in the dentist's waiting room and again an hour later after the conclusion of the visit to the dentist. The data are as follow: B.P. Before: 132, 135, 149, 133, 119, 121, 128, 132, 119, 110 B.P. After: 118, 137, 140, 139, 107, 116, 122, 124, 115, 103 Assume normality if needed for this problem. Let Before denote the true mean blood pressure while waiting to see the dentists, and denote the true mean blood pressure after seeing the dentist. After The appropriate null and alternative hypothesis for testing the researcher's claim is is HoμBefore μBefore - μAfter #0 O is Ho: M Before : μBefore After > 0 O is Ho: M Before - After ≤0 vs. Ha : Before After > 0 is Ho : μBefore – µAfter ≤ 0 vs. Ha : μBefore – μAfter < 0 - After = 0 vs. Ha After ≥ 0 vs. Ha -
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