Worksheet 9
1.
A company employs a total of 16 workers. The management has asked these employees to select 2 workers who
will negotiate a new contract with management. The employees have decided to se
Worksheet Chapter 8 and 9
Chapter 8.3 Confidence Intervals for a population mean - population standard deviation not given
1. Find the value of t from the t distribution table for each of the followin
Additional homework 2 solution
1.
You dont need to make the probability tree , since events are independent. (as we did in class)
3. Part a (I will scan the complete solutions)
e) P( F U) = 0.0306 0 ,
Chapter 3-5
( xi x )2
s
n 1
2
E(x) = x P(x)
x P( x)
2
n
Cx
n!
x!(n x)!
np
P( x) n C x p x q n x
and
2
Chapter 6
Chapter 7
x and x
X
p
N
and
n
x
p
n
x
x
p
p p
pq
n
Chapter 8
x z x
x tsx
whe
Chapter 8 - Estimation of the mean and proportion Condence Intervals.
8.2 Estimation of a population mean: u eknown .
Always check assumptions first
Case I. If the following three conditions are fulfi
Additional Homework 2 due Thursday, March 10
1. A contractor has submitted bids for two state construction projects. The probability of winning each contract is .25,
and it is the same for both contra
Stat 240 Binomial Additional Problems
1.
An airline sells 100 tickets for flight with 98 seats because, on average, 2% of purchasers of
airline tickets do not show up for the departure of their flight
Sampling and sampling distributions.
Chapter 7
Parameters are numerical descriptive measures for
populations (fixed, often unknown values)
For instance: For the normal distribution: the parameters
ar
Stat 240 Worksheet 1-Monday
1. Indicate whether each of the following constitutes data collected from a population or a sample.
a.
b.
c.
d.
Salaries of CEOs of all companies in New York City
Five hund