In a bell-shaped standard normal curve, mean +-2 standard detions covers:
Correct Answer: 95%
Description: If the distribution of observations is bell-shaped, then even more can be said about the percentage of observations that lay between the mean and +- 2 standard detions. For a bell-shaped distribution, approximately: 67% of the observations lie between the mean +- 1 standard detion 95% of the observations lie between the mean +- 2 standard detions 99.7% of the observations lie between the mean +- 3 standard detions Ref: Dawson B., Trapp R.G. (2004). Chapter 3. Summarizing Data & Presenting Data in Tables & Graphs. In B. Dawson, R.G. Trapp (Eds), Basic & Clinical Biostatistics, 4e.
Category:
Social & Preventive Medicine
Get More
Subject Mock Tests
Practice with over 200,000 questions from various medical subjects and improve your knowledge.
Attempt a mock test nowMock Exam
Take an exam with 100 random questions selected from all subjects to test your knowledge.
Coming SoonGet More
Subject Mock Tests
Try practicing mock tests with over 200,000 questions from various medical subjects.
Attempt a mock test now