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March 8th, 2013, 10:25 AM   #1
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Need help with 2 stats problems

Given the independent variable with mean ?_x = 120 and ?_y = 300 and standard deviations ?_x = 12, ?_y = 16. What is the mean and standard of each variable?

a) 0.8y+20 b)2x-100 c)x+2y

Please explain how you did this and show steps so that I can understand how it was done.

#2. Lets say 13% of people are left handed. If we randomly test 5 persons, find the probability of these:

a) some lefties among 5 people
b) there are exactly three left handed people in the team
c) there are at least three left handed people in the team
d)there are less than 3 lefties in the team

Again, please explain how you did this thanks!
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March 8th, 2013, 10:40 AM   #2
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Re: Need help with 2 stats problems

Four issues:

i) Please do not post topic titles in all caps.

ii) Please post a topic once only. Posting multiple times runs the risk of duplication of effort on the part of our contributors, whose time is valuable. I have deleted the duplicate topic twice now.

iii) Please refrain from the use of text abbreviations. Posting questions on a forum should be considered a more formal setting than texting a friend.

iv) Showing some effort, such what you have tried so far, or what your thoughts are on how to begin lets our contributors know where you are stuck and how best to help.
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