# Questions about a sample chosen from a large population.

• Apr 4th 2010, 04:51 AM
lakasaan
Questions about a sample chosen from a large population.
Hi guys i got this question i do not understand how to answer it..(Wondering)

Lettrman or leno? Who is the king of late night tv ? An
Internet survey estimates that,when given a choice between David
Letterman and Jay leno , 52% of the population prefers Jay Leno.
Suppose that you select three people randomly and ask them which
host they prefer.

A) Find the Probability distribution
for X, the number of people in the sample of three who would prefer
Jay Leno ?

C) What is the probaility that exactly
one of the Three would prefer Jay Leno ?

D) What are the population mean and
standard deviation for the random variable x?
• Apr 4th 2010, 02:33 PM
mr fantastic
Quote:

Originally Posted by lakasaan
Hi guys i got this question i do not understand how to answer it..(Wondering)

Lettrman or leno? Who is the king of late night tv ? An
Internet survey estimates that,when given a choice between David
Letterman and Jay leno , 52% of the population prefers Jay Leno.
Suppose that you select three people randomly and ask them which
host they prefer.

A) Find the Probability distribution
for X, the number of people in the sample of three who would prefer
Jay Leno ?

C) What is the probaility that exactly
one of the Three would prefer Jay Leno ?

D) What are the population mean and
standard deviation for the random variable x?

X ~ Binomial(p = 0.52, n = 3).
• Apr 5th 2010, 03:26 AM
lakasaan
Thank you mr.Fantastic :D