Medical researchers conducted a study designed to evaluate the relationship between blood pressure (y), age (x1), and cholesterol (x2). They proposed a linear model. A total of 126 individuals were randomly sampled, and blood pressure, age, and cholesterol were recorded for each. The regression summary appears here:
The regression equation is
Blood Pressure = 45.5 + 1.03 Age + 0.032 Cholesterol
Predictor Coef SE Coef T P
Constant 45.54 50.73 0.90 0.371
Age 1.02866 0.03920 26.24 0.000
Cholesterol 0.0323 0.4071 0.08 0.937
S = 5.30434 R-Sq = 85.0% R-Sq(adj) = 84.7%
Analysis of Variance
Source DF SS MS F P
Regression 2 19600.5 9800.2 348.32 0.000
Residual Error 123 3460.7 28.1
Total 125 23061.2
Predicted Values for New Observations
New
Obs Fit SE Fit 95% CI 95% PI
1 75.301 0.741 (73.833, 76.769) (64.699, 85.903)
2 75.624 4.219 (67.273, 83.975). (62.209, 89.040)XX
3 74.272 0.772 (72.744, 75.800) (63.662, 84.882)
XX denotes a point that is an extreme outlier in the predictors.
Values of Predictors for New Observations
New
Obs Age Cholesterol
1 25.0 25
2 25.0 135
3 24.0 125
What is a 95% confidence interval on the mean blood pressure for all 25-year-olds with a cholesterol level of 135?
◦
(73.833, 76.769)
◦
(67.273, 83.975)
◦
(72.744, 75.800)
◦
(62.209, 89.040)
Urinary tract infection. A UTI is characterized by fever, lumbar or abdominal pain, and pain or burn
The bypass actuator opens the bypass valve to control boost pressure.
The fuel system should hold pressure if the system is leak free.
Apply oil or lotion to the entire leg with effleurage. Use light to medium pressure to warm ...
Blood pressure test
Formation of Blood Cells