Economics 215 Name
S ection 101
Homework #2.
Due: Monday, February 2, 2008.
1) There are eight survivors from a shipwreck that managed to swim to a remote island that just
happeim to be bccupied by a television crew so you see what happens on your local c
Economics 21 5
Section 101
Homework #4.
Due Monday, September 29, 2008.
1. A continuous random variable X is known to be uniformly distributed
betweenOand 10. J0,g:; 2 O
a) Whats P(X> 8)? W P
r 4? W i
b) Whats 13(2ng6)? yew23:» 7;" viii/:3
L) a
'2 "x.
(
Economics 215
Name_
Monday, April 7, 2014
Exam #2
1). From a population of size 100,000 youve drawn a sample of size n = 36 to estimate the
population mean of the variable of interest. You are given that the variable of interest in this
population has a n
Chapter 1
A Framework for Financial Accounting
PART A ACCOUNTING AS A
MEASUREMENT/COMMUNICATION PROCESS
LO1 Describe the two primary functions of financial accounting.
A. The functions of financial accounting are to
a. _ business activities of a company
a
Chpt. 8. Interval Estimation.
Recall from chapter 7 that the sample mean xand
sample proportion p have probability distributions
of their own, called sampling distributions.
Information about those probability distributions
could be used to develop probab
Chpt. 9. Hypothesis Testing.
We developed point and interval estimates of
population parameters and p in chapters 7 & 8.
Now we are going to use what we learned there to
do hypothesis testing. We make a statement
about the possible value of a population p
Chpt. 10.1 Statistical Inferences about Means
with Two Populations.
In chapters 8 & 9 we developed interval estimates
and conducted hypothesis tests on a sample from a
single population.
In chapter 8, the interval estimate provided us an
estimate of the p
Chpt. 7. Sampling and Sampling Distributions.
Recall from earlier chapters;
A population is the set of all the elements of
interest in a study.
A sample is a subset of elements from the
population.
Due to excessive time and/or costs associated with
collec
Economics 215
Name_
Monday, April 1, 2013
Exam #2
1). From a population of size 100,000 youve drawn a sample of size n = 36 to estimate the
population mean of the variable of interest. You are given that the variable of interest in this
population has a n
F
i
!:
s
ll
r
frBrs_?r2 suMh,cfw_ARY OF Icfw_Y?OTHESIS TESTS ABOUTA POPULION MEAN:
o-KNOwN CASE
ti
i
g
Hypotheses
Test Statistic
Lower Tail Test'
Ho: lr > lta
Ha:1o
7:x-llo
* olln
Rejection RuIe:
p-Value Approach
Reject Hof
p-value 3 a
Rejection Rule:
Cri
Practice Exam 2
ECON 215
1.
Each individual outcome of an experiment is called
(a) the sample space (b) a sample point
(c) a trial
(d) an event
2.
The collection of all possible sample points in an experiment is
(a) the sample space (b) an event
(c) a com
P(AB) = P(A) + P(B) P(AB)
P(AB) = P(A) = P(B) - P(AB)
P(A/B) = P(AB) / P(B)
P(B/A) = (AB) / P(A)
M C all M & C
M C only M & C
P(C M) = P (M C)
Binomial Distribution: n - # of trials; x- # of successes; p- probability of success
f(x) = (n! / x! (n-x)!) X
Assignment 3
Econ 215
Makenzie Beard
1)
List Price
Mean
Standard Error
Median
Mode
474007.5
31194.293
437000
975000
Standard Deviation
197290.03
Sample Variance
Skewness
Range
Minimum
Maximum
Sum
Count
Confidence
Level(95.0%)
3.892E+10
1.0958146
805100
16
Exam 2 Formulas
Bayes Theorem:
P (A | C) =
P (A)P (C | A)
P (A)P (C | A) + P (B)P (C | B)
Binomial Probability Function
f (x) =
n!
px (1 p)nx
x!(n x)!
Poisson Probability Function
f (x) =
1
x e
x!
Assignment 2
ECON 215 Summer 2017
Due: July 21, 11:59 pm
For this assignment, you will use the Russell.csv file found on Canvas at the following location:
Pages > Data Sets > Chapter 3 > Russell.csv
The data set details the percent return (or growth rate)
Assignment 1
ECON 215 Summer 2017
Due: July 14, 11:59 pm
For this assignment, you will use the 2011Moves.csv file found on Canvas at the following location:
Pages > Data Sets > Chapter 3 > 2011Movies.csv
The data set provides performance data for 100 moti
-,_. 3.4
Economics 215, Section 101, Homework #8. Due: Monday
Name
1. A sample of 0 items provides a sample standard deviation of 9.
a. Compute a 90% condence interval estimate of the population variance.
- 2 L p11 an 5 L L _ 7
_, a, U2 ,3 M [Na 2%;
x
Economics 215
Section 101
Homework #3.
Due Monday, February 5, 2007
1). Which of the following random variables would you generally expect
to be discrete and which would you expect to be continuous? (Identify
variables as a, b, c, d, e, and i).
a) The n
ACCT 201 Sec 001/002
Chapter 1 Study Plan
Before Class on August 26:
1. Read syllabus
2. Read Great Adventures, pp. 50-51
Before Class on August 28:
1. Read all of Chapter 1
2. Print Chapter 1 Outline (Blackboard)
3. Print Chapter 1 Homework (Blackboard/C
Economics 215
Name_
Section 101
Homework #5.
Due Monday, October 27, 2014
1). A population of size 10,000 has a mean of 200 and a standard
deviation of 50 for variable X. A sample of size 100 is going to be
drawn.
a) What is the expected value for the sam
Econ. 215
Name_
Exam #1, October 7, 2013
1. a. From a sample of 4 paired observations of the discrete random variables A and B, the
following cross-tabulation was created. Calculate the sample means, variances, standard
deviations, covariance, and correla
Economics 215, Spring 2014 Final Exam
Name_
1.The following scattergram of data was taken from a sample of 3 (x, y) paired observations. (All
points depicted are integer values).
8|
(3,8)
7|
6|
5 | (1,5)
(y)
4|
3|
2|
(5,2)
1|
1 2 3 4 5 6
(x)
a). Calculate
ku,
Name
Economics 215
Monday, April 7 ,2014
I
Exam#2
1). From a population of size 100,000 you've drawn a sample of size n : 36 to estimate the
population mean of the variable of interest. You are given that the variable of interest in this
36. The sampl
Practice Exam 3
ECON 215
1.
The sampling distribution of x is the
(a) probability distribution of the sample mean
(b) probability distribution of the sample proportion
(c) mean of the sample
(d) mean of the population
2.
A simple random sample of 100 obse
Practice Exam 1
ECON 215
1.
In a questionnaire, respondents are asked to mark their gender as male or female. The scale of
measurement for gender is
(a) ordinal scale (b) nominal scale
(c) ratio scale
(d) interval scale
2.
Some hotels ask their guests to
Homework 2
1)
A: 67 Observations
B: 8 Variables
C: Siblings, Income, Distance
D: An individual Student
2)
Gender Frequency
Male
47
Female
19
Observations: There are far more Males than Females in the class. This could mean that males
are more likely to pu
ECON215
1.24
a. Population: UW students
Sample: 100 students
1.25
a. The 2480 students that had experienced the feeling
1.28
a. Population: Students at your school
Sample: The 100 students surveyed
b. Descriptive statistics would be used because:
Infernal
Chapter 11 and 12 Review Quiz
Multiple Choice
Identify the choice that best completes the statement or answers the question.
_
1. If we want to provide a 95% confidence interval for the mean of a population, the confidence coefficient is
a. 0.485
b. 1.96