This topic is taught through its practice: 12 practice questions, each with the reasoning behind the answer, and the same idea again in plain words.
Quick check
5 questions here, of 12 in this lesson’s practice set. Answers stay hidden until you check.
Question 1 of 5foundational
A pre-nursing research class records resting pulse rates for 200 healthy adults. The mean is 72 beats/min with a standard deviation of 6 beats/min. Which statement best describes what the standard deviation of 6 tells the class?
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Question 2 of 5foundational
In a data set that follows a normal distribution, approximately what percentage of values falls within one standard deviation on either side of the mean?
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Question 3 of 5foundational
A statistics handout reports that a set of student scores has a variance of 81. Which statement correctly describes the relationship between variance and standard deviation for these scores?
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Question 4 of 5intermediate
An instructor adds 5 bonus points to every student's exam score. One student had 80 and another had 76. What happens to the standard deviation of the class scores?
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Question 5 of 5intermediate
Two nursing units each report a mean patient satisfaction score of 80. Unit A has a standard deviation of 3 and Unit B has a standard deviation of 9. Which comparison is accurate?
