Friday

October 31, 2014

October 31, 2014

Posted by **Hayli** on Wednesday, September 29, 2010 at 9:50pm.

a-Find the probability distribution for x, the number of people in the sample of three who would prefer Jay Leno.

b-What is the probability that exactly one of the three would prefer Jay Leno?

c-What are the population mean and standard deviation for the random variable x?

- STATISTICS -
**MathGuru**, Thursday, September 30, 2010 at 12:06pmUse a normal approximation to the binomial distribution.

Your values are the following:

p = .52, q = 1 - p = .48, x = 1, and n = 3

Find mean and standard deviation.

mean = np = (3)(.52) = ?

sd = √npq = √(3)(.52)(.48) = ?

I'll let you finish the calculations.

Once you have the mean and standard deviation, use z-scores and z-table to find probability.

P(0.5 < x < 1.5) =

P[(0.5 - mean)/sd] < z < [(1.5 - mean)/sd]

Once you have the two z-scores (substitute the mean and sd calculated), find the difference between the two using a z-table. This will be your probability.

I hope this will help get you started.

**Answer this Question**

**Related Questions**

Statistics - Who is the king of late night TV? An Internet survey estimates that...

Statistics - A survey of 815 students is asked whether or not they have cable TV...

Statistics - In his management information systems textbook,Professor David ...

statistics - . In his management information systems textbook, Professor David ...

statistics - Your friend David works for an online magazine and calls you late ...

statistics - Webcredible, a UK-based consulting firm specializ- ing in websites...

english - Which of these is a simple sentence and why? 1) Karen and David ...

English - Which of the following is a simple sentence? A. Karen and David ...

Literature - 1. What is the BEST statement of Alice Walker's main idea in "...

Statistics - According to the Pew Internet &American Life Project. 75% of ...