A Nurse Measured the Blood Pressure of Each Person Who

question 8

Multiple Choice

A nurse measured the blood pressure of each person who visited her clinic. Following is a relative-frequency histogram for the systolic blood pressure readings for those people aged between 25 and 40. Use the histogram to answer the question. The blood pressure readings Were rounded to the next higher whole number.



Given that 800 people were aged between 25 and 40, approximately how many had a systolic Blood pressure reading greater than 120 and less than or equal to 140?

• A) 0.40
• B) 32
• C) 320
• D) 400

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Definitions:

Cost Analysis

The process of evaluating the costs involved in producing a product or providing a service, to determine ways to reduce or manage expenditures.

R-squared

A statistical measure that represents the proportion of the variance for a dependent variable that's explained by an independent variable or variables in a regression model.

Dependent Variable

A variable that responds to some causal factor; total cost is the dependent variable, as represented by the letter Y, in the equation Y = a + bX.

Independent Variable

A variable in an experiment that is manipulated to observe its effect on the dependent variable.