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Brittney Brown
June 23, 2010
Stat 4210
Homework 2
1. The model y= 158 – 1.14X1 0.442X2 13.3X3 could be used to estimate the
rating of patient’s satisfaction with treatment received by the
age of patient,
rating of severity of patient’s illness, and the rating of patient’s level of anxiety.
The coefficients have signs in which were expected. The patients’ age, severity
of illness, and level of anxiety should all have a negative impact on the patient’s
satisfaction with the treatment received.
The null hypothesis states that all of the coefficients are equal to zero. The
alternative hypothesis states that all of the coefficients are not equal to zero. We
reject the null hypothesis and state that the coefficient X1 is not equal to 0 of t=
5.31, pvalue= 0.00. We are 95% confident that the X1 constant is between
0.714 and 1.57.
The Adjusted Rsquared value is 65.9%, which means 65.9% of the variability in
total rating of satisfaction with the treatment received can be explained by the
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