The systolic blood pressure of individuals is thought to be related to both age

Question

The systolic blood pressure of individuals is thought to be related to both age and weight. Let the systolic blood pressure, age, and weight be represented by the variables x1, x2, and x3, respectively. Suppose that Minitab was used to generate the following descriptive statistics, correlations, and regression analysis for a random sample of 15 individuals.

Regression Analysis

The regression equation is

x1 = 0.703 + 1.388x2 + 0.907x3

Descriptive Statistics Variable N Mean Median TrMean StDev SE Mean x1 15 159.35 159.65 159.35 3.401 0.878134 x2 15 72.77 73.77 72.77 1.722 0.444618 x3 15 185.90 185.20 185.90 4.266 1.101476

Explanation / Answer

As we can see that p - values for both the coefficients x2 and x3 are less than 0.05 so we reject the null hypothesis.

Hence,

We reject the null hypothesis that the coefficient should equal to zero.

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