A community for students.
Here's the question you clicked on:
 0 viewing
anonymous
 one year ago
Alice has measured the hemoglobin levels of 200 people. If the data follows a normal distribution with a mean of 10 and a standard deviation of 1, what can you conclude?
anonymous
 one year ago
Alice has measured the hemoglobin levels of 200 people. If the data follows a normal distribution with a mean of 10 and a standard deviation of 1, what can you conclude?

This Question is Open

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0This question is designed to see how well you understand the concepts related to a Normal Distribution. Many times when we sample a large body of data (say the hemoglobin levels of 200 people) we find that it follows the pattern of a "bell curve" which in Statistics is called a Normal Distribution. This means that if I plot the hemoglobin level on the xaxis and the number of people on the yaxis, I will get a bellshaped curve with the peak of the "bell" located at the mean value (hemoglobin 10). The "standard deviation" of a Normal curve measures how spread out the bell  shape is. A larger Standard Deviation means a shorter broader curve, and a smaller Standard Deviation means a taller, narrower curve. The properties of a Normal Distribution tell us the following things : About half of the people have a hemoglobin greater than the mean value, and about half have a hemoglobin less that the mean value (the Normal curve is symmetric) About 68% of the people have a hemoglobin level within one Standard Deviation of the mean, that means that 68% of the 200 people will have a hemoglobin level between 9 and 11. 68% of 200 is 136 people. That means that everybody else, or 64 people, have either a hemoglobin less than 9 or greater than 11. AND since our distribution is symmetric, half of these people will have less than 9 and half will have more than 11. This means 32 people have a hemoglobin less than 9. A great website to review these topics is http://Www.mathisfun.com/data/standardnormaldistribution.html
Ask your own question
Sign UpFind more explanations on OpenStudy
Your question is ready. Sign up for free to start getting answers.
spraguer
(Moderator)
5
→ View Detailed Profile
is replying to Can someone tell me what button the professor is hitting...
23
 Teamwork 19 Teammate
 Problem Solving 19 Hero
 Engagement 19 Mad Hatter
 You have blocked this person.
 ✔ You're a fan Checking fan status...
Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.