STAT 201 Week 6_Power Point

# STAT 201 Week 6_Power Point - distributions are shown as...

This preview shows pages 1–4. Sign up to view the full content.

Click to edit Master subtitle style 9/26/11 STAT 201 Recitation Week 6

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
9/26/11 Exercise 5-2, pp.196 Two numbers are randomly drawn  without replacement from a list of  five. If the five numbers are  2,2,4,6,8, what is the probability  distribution of the sum of the two  numbers selected?
9/26/11 The random variable, x (total, sum of the two numbers  selected) , and the frequency and relative frequency

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: distributions are shown as follows : x P( x) x P(x) 4 0.1 6 0.2 8 0.2 10 0.3 12 0.1 14 0.1 9/26/11 Expected value of x =4×0.1 +6×0.2 +8×0.2 +10×0.3 +12×0.1 +14×0.1 =8.8 Variance of x =(4-8.8)2×0.1 x P(x) x*P(x) 4 0.1 0.4 6 0.2 1.2 8 0.2 1.6 10 0.3 3 12 0.1 1.2 14 0.1 1.4 E(x)= 8.8 x P(x) [x-E(x)]2*P(x) 4 0.1 2.304 6 0.2 1.568 8 0.2 0.128 10 0.3 0.432 12 0.1 1.024 14 0.1 2.704 V(x)=...
View Full Document

## This note was uploaded on 09/26/2011 for the course STAT 201 taught by Professor Drex during the Spring '04 term at Drexel.

### Page1 / 4

STAT 201 Week 6_Power Point - distributions are shown as...

This preview shows document pages 1 - 4. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online