Probability
Not what you're looking for?
Jim's systolic blood pressure is a random variable with a mean of 145 mmHg and a standard deviation of 20 mmHg. For Jim's age group, 140 is the cutoff for high blood pressure.
If Jim's systolic blood pressure is taken at a randomly chosen moment, what is the probability that it will be, (a) 135 or less?
(b) 175 or more?
(c) between 125 and 165?
Purchase this Solution
Solution Summary
A Complete, Neat and Step-by-step Solution is provided in the attached file.
Solution Preview
z = (x - mu)/sigma
(a) z = (135 - 145)/20 = -0.5
P(x < 135) = P(z < -0.5) = 0.3085 (To get this, subtract the area under the standard normal curve between z = 0 ...
Purchase this Solution
Free BrainMass Quizzes
Know Your Statistical Concepts
Each question is a choice-summary multiple choice question that presents you with a statistical concept and then 4 numbered statements. You must decide which (if any) of the numbered statements is/are true as they relate to the statistical concept.
Measures of Central Tendency
Tests knowledge of the three main measures of central tendency, including some simple calculation questions.
Measures of Central Tendency
This quiz evaluates the students understanding of the measures of central tendency seen in statistics. This quiz is specifically designed to incorporate the measures of central tendency as they relate to psychological research.
Terms and Definitions for Statistics
This quiz covers basic terms and definitions of statistics.