Question

The goal of a study by Klingler et at. Was to determine how symptom recognition and perception influence clinical presentation as a function of race. They characterized symptoms and care-seeking behavior in African-American patients with chest pain seen in the emergency department. One of the presenting vital signs was systolic blood pressure. Among 144 African-American men, the mean systolic blood pressure was 146 mm Hg with a standard deviation of 27. We wish to know if, on the basis of the data, we may conclude that the mean systolic blood pressure for a population of African-American men is greater than 140. Let ? = .05. (a) Describe the variable this research was interested. (b) Define the variable of the population using probability expression.

Answer 1

(A) This research is interested in means systolic blood pressure of African-American men.

(B) The probability expression is

setting the given values from the question, where

we get

this gives

= 0.0038 (using normal distribution table)

so, the p value is significant at 0.05 because the calculated p value is less than alpha level 0.05.

we can conclude that the mean systolic blood pressure for a population of African-American men is greater than 140.