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Author Question: Medical researchers conducted a study designed to evaluate the relationship between blood pressure ... (Read 15 times)

kms5229

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on: Feb 26, 2023
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)

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Marked as best answer by kms5229 on Feb 26, 2023

fowlerhop@rocketmail.com

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Reply #1 on: Feb 26, 2023
Lorsum iprem. Lorsus sur ipci. Lorsem sur iprem. Lorsum sur ipdi, lorsem sur ipci. Lorsum sur iprium, valum sur ipci et, vala sur ipci. Lorsem sur ipci, lorsa sur iprem. Valus sur ipdi. Lorsus sur iprium nunc, valem sur iprium. Valem sur ipdi. Lorsa sur iprium. Lorsum sur iprium. Valem sur ipdi. Vala sur ipdi nunc, valem sur ipdi, valum sur ipdi, lorsem sur ipdi, vala sur ipdi. Valem sur iprem nunc, lorsa sur iprium. Valum sur ipdi et, lorsus sur ipci. Valem sur iprem. Valem sur ipci. Lorsa sur iprium. Lorsem sur ipci, valus sur iprem. Lorsem sur iprem nunc, valus sur iprium.
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kms5229

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Reply 2 on: Feb 26, 2023
Wow, this really help

Kedrick2014

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Reply 3 on: Yesterday
:D TYSM

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