Question

Use the following information for problems 1 and 2.

A researcher is interested in the relationship between systolic and diastolic blood pressure in adult humans. The researcher uses systolic blood pressure as the explanatory variable and diastolic blood pressure as the response variable. The researcher measures the systolic and diastolic blood pressure for 16 adults. The minimum systolic blood pressure in the data set is 105 and the maximum systolic blood pressure in the data set is 157. The units of measurement are mm.

The linear model has an intercept of (b₀) 9.18, and a slope ( b₁) of 0.525.

1. What is the expected value of diastolic blood pressure for someone with a systolic blood pressure of 142 mm?

(a) 79.74 (b) 80.14 (c) 83.73 )d) 86.43

2. You have only systolic blood pressure data on two new adults. The first has a systolic blood pressure of 130 mm, and the second one has a systolic blood pressure of 184 mm. What is the expected value of the diastolic blood pressure for the adult whose systolic blood pressure does not involve extrapolation?

(a) 77.43 (b) 75.23 (c) 104.58 (d) 105.79

Answer 1