NAME: _
I.D.: _
TEST ONE
PROBABILITY AND STATISTICS, ECON 15A
APRIL 13, 2012
1. You want to determine how many loaves of Original Sheepherder Bread are sold per day at Schats Bakery in Bishop, California
[for the year 2011]. You stand outside for ten diff
NAME: _
I.D.: _
TEST TWO
PROBABILITY AND STATISTICS, ECON 15A
APRIL 27, 2012
1. In Lemon County, each political precinct had higher proportion of Democrats voting than Republicans voting. Is it possible that
when we combine the precincts and look at all o
NAME: _
I.D.: _
TEST ONE
PROBABILITY AND STATISTICS, ECON 15A
APRIL 13, 2012
1. You want to determine how many loaves of Original Sheepherder Bread are sold per day at Schats Bakery in Bishop, California
[for the year 2011]. You stand outside for ten diff
TEST FIVE
PROBABILITY AND STATISTICS, ECON 15A
DECEMBER 12, 2012
1. 60% of all accidents involve a driver who had been texting. What is the probability that out of six random accidents, two did
not involve a driver who had been texting? (Meaning four did
(AME: I.D.:
TEST ONE
PROBABILITY AND STATISTICS, ECON 15A
APRIL 11, 2014
1. You want to determine how many loaves of Original Sheepherder Bread are sold per day at Schats Bakery in Bishop, California
[for the year 2013]. You stand outside for ten differ
NAME: _
I.D.: _
TEST FOUR
PROBABILITY AND STATISTICS, ECON 15A
MAY 25, 2012
1 2. (Two questions 20 points). There is a random variable X. It has the probability distribution of f(x) = 0.8 0.1x, for 2 < x < 4.
What is E(X)? Show all work.
2
4
3 4.
5.
(Two
1. Give the definition of statistical independence of two events.
a. The event A is statistically independent from the event C if P(A|C)=P(A)
b. We define statistical independence more generally: A set of random variables
cfw_X1,.Xn are all independent of
Homework #1
A hard copy is due in class on Tuesday, February 14, 2017.
Late homeworks are
not accepted. If you cannot make it to lecture, you should arrange to hand in your
homework ahead of time. For data, you must use the August 2016 CPS data set.
Your
NAME: _
I.D.: _
FINAL
PROBABILITY AND STATISTICS, ECON 15A
JUNE 11, 2012
1.
The rows in a data table (spreadsheet) are called _, and the columns are called _.
2.
If P(X) = P(Y), are X and Y iid? Please explain.
3. Researchers compared the performance of f
1. Give the definition of statistical independence of two events.
a. The event A is statistically independent from the event C if P(A|C)=P(A)
b. We define statistical independence more generally: A set of random variables cfw_X1,.Xn are all
independent of
Chapter 2: Variables, Measurements, Explanations
1
Seven Types of Measurement
5 scales, 2 more types you will see in econometrics Basic Idea: Just because you used some numbers to represent some empirical data you're interested in does NOT mean that the
Solutions to Homework 10
Raffaele B. Mari, CPA
Due November 18, 2010
Econ 25 Econ of Acctg.
EXERCISE 12-6
FELIX CORPORATION
Statement of Cash FlowsIndirect Method
For the Year Ended December 31, 2010
Cash flows operating activities
Net income .
Adjustment
Homework 2
1. Basic Sample:
General Sample:
Hypothesis Testing for WAGES
Date: 12/03/14 Time: 13:31
Sample: 1 14333 IF AGE>=22 AND AGE<=28 AND HOURS>=40
AND
EDUCATION=43
Included observations: 386
Test of Hypothesis: Mean = 45000.00
Sample Mean = 47805.12
Page 1 of 49
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Stuff I Need to Know for Econ 15A
These questions represent
A major purpose of note-taking described in class was to create a record of all of the facts from the original work. F
According to the Yale Writing Center (nd), one purpose of proper attribution in scholarly research is To Recreate a
Sense of Lively Deba
Stuff I Need to Know for Econ 15B
How to Understand and Use This Document:
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Stuff I Need to Know for Econ 15A
How to Understand and Use This Document:
This document contains a large number of specific questions (aka NeedToKnows
actual exam questions may differ; cf. below). They will eventually encompass
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!
Stuff I Need to Know for Econ 15A
How to Understand and Use This Document:
This document contains a large number of specific questions (aka NeedToKnows
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everythin
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YOU ARE STRONGLY ENCOURAGED TO STUDY THE
Worked Examples
and to consider the:
OneNotes
Page 2 of 54
Stuff I Need to Know for Econ 15A
These questions represent everything you need to know for the upcoming exam (only
as far as we have covered
1. . What conditions must a function f meet in order to be a pdf?
a. f(x) 0, for every number x;
b.
+a
f(x)d1 where
f(x)dx=1= lim f(x)dx
a a
2. If X probability distribution, why doesnt it matter whether you determine Pr(X<5.1) or Pr(X
5.1)?
a. because
The FIFTEEN QUESTIONS follow
1) Five cards are dealt, what is the probability that the 5th one is a king?
[4/52]
2) Five cards are dealt, what is the probability that the 5th one is a king, given that the first four are queens?
[4/48]
3) Five cards are de
Page 1 of 46
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EXAMPLES (both available on the class website).
Stuff I Need to Know for Econ 15A
These questions represent everything you need to know for the upcoming exam (only
as far as we
Page 1 of 56
Stuff I Need to Know for Econ 15A
How to Understand and Use This Document:
This document contains a large number of specific questions (aka NeedToKnows
actual exam questions may differ; cf. below). They will eventually encompass
everything y
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Stuff I Need to Know for Econ 15A
How to Understand and Use This Document:
This document contains a large number of specific questions (aka NeedToKnows
actual exam questions may differ; cf. below). They will eventually encompass
everything y
The Normal Distribution N (, 2)
Worked Examples
Kent Johnson
Last compiled: March 1, 2017
The z-table gives the probabilities for P r[Z z], where Z N (0, 1).
These z-scores and their probabilities are in 1-1 correspondence, so knowing
a z-score is equival
Proportions
Worked Examples
Kent Johnson, Fall 2016
Last compiled: November 14, 2016
1
Hypothesis Tests of Proportions
Tests of proportions are mostly similar to the quantitative tests we have
already examined.
n = 1041; Successes : 431
H0 : = 0.45 ;
= 0
The Uniform Distribution: U nif (a, b)
Worked Examples
Kent Johnson
Last compiled: March 4, 2017
1
Examples
1.1
Basic Examples
Consider the uniform distribution of possible points in this course that result
in a passing grade: X U nif (60, 111) .
PDF of U