Got Homework?
Connect with other students for help. It's a free community.
Here's the question you clicked on:
 0 viewing
wayne2434
Group Title
Weights of male mountain lions follow the normal distribution with a median of 150 pounds and an interquartile range of 8.2 pounds. Find the 75th percentile of the weights.
 8 months ago
 8 months ago
wayne2434 Group Title
Weights of male mountain lions follow the normal distribution with a median of 150 pounds and an interquartile range of 8.2 pounds. Find the 75th percentile of the weights.
 8 months ago
 8 months ago

This Question is Open

kirbykirby Group TitleBest ResponseYou've already chosen the best response.0
In a normal distribution, the median = mean. Also, The mean = 50th percentile ("Q2") The interquartile range = Q3  Q1 = 75th percentile  25th percentile. Now, since the normal distribution is symmetric, half your data is below the mean, and half is above the mean. So, you proportionately find 8.2/2 = 4.1 pounds being Q3  Q2 , and Q2  Q1 Schematically: dw:1397373422765:dw
 8 months ago

kirbykirby Group TitleBest ResponseYou've already chosen the best response.0
Thus I hope you can see that Q3, the 75th percentile, is 150+4.1 = 154.1
 8 months ago

kirbykirby Group TitleBest ResponseYou've already chosen the best response.0
Maybe this picture is more clear: http://en.wikipedia.org/wiki/File:Boxplot_vs_PDF.svg
 8 months ago
See more questions >>>
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.