3. Dentists make many people nervous. To assess any effect of such nervousness on blood pressure, the systolic blood pressure of 60 subjects was measured both in a dental setting and in a medical setting (The Effect of the Dental Setting on Blood Pressure Measurement," Amer. J. of Public Health, 1983:1210- 1214). For each subject, the difference between dental setting pressure and medical setting pressure was computed; the resulting sample mean difference and sample standard deviation of the differences were 4.47 and 8.77 mmHg, respectively. o (a) Estimate the true mean difference between blood pressures for these two settings using a 99% confidence level. o (b) Does it appear that the true mean pressure is different in a dental setting than in a medical setting? Explain your reasoning.

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3. Dentists make many people nervous. To assess any
effect of such nervousness on blood pressure, the
systolic blood pressure of 60 subjects was measured
both in a dental setting and in a medical setting (The
Effect of the Dental Setting on Blood Pressure
Measurement," Amer. J. of Public Health, 1983:1210-
1214). For each subject, the difference between dental
setting pressure and medical setting pressure was
computed; the resulting sample mean difference and
sample standard deviation of the differences were 4.47
and 8.77 mmHg, respectively.
o (a) Estimate the true mean difference
between blood pressures for these two
settings using a 99% confidence level.
o (b) Does it appear that the true mean
pressure is different in a dental setting than
in a medical setting? Explain your reasoning.
Transcribed Image Text:3. Dentists make many people nervous. To assess any effect of such nervousness on blood pressure, the systolic blood pressure of 60 subjects was measured both in a dental setting and in a medical setting (The Effect of the Dental Setting on Blood Pressure Measurement," Amer. J. of Public Health, 1983:1210- 1214). For each subject, the difference between dental setting pressure and medical setting pressure was computed; the resulting sample mean difference and sample standard deviation of the differences were 4.47 and 8.77 mmHg, respectively. o (a) Estimate the true mean difference between blood pressures for these two settings using a 99% confidence level. o (b) Does it appear that the true mean pressure is different in a dental setting than in a medical setting? Explain your reasoning.
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