Spring 2013
BA 275
Chapter 1: What is Statistics? (p. 2)
Types of Statistics
- Descriptive: methods of organizing, summarizing, and presenting data in an informative way
- Inferential: the methods us
Chapter 8: Sampling Methods and the Central Limit Theorem (p. 224)
1. Sampling used to make inferences because of
1. Cost
2. Time
3. Limited value of additional information
4. Impossible to check enti
BA 276
11/12/16
Coin Project
Side
#
Heads
16
Tails
24
p0 0.5
16
0.4
40
n 40
p
0.05
Hypothesis
H
H
0
: p 0.5
a
: p 0.5
If a coin is tossed 40 times, I expect 20 of it to be heads. In my experiment, I
Appendix B: Tables
TABLE 1
CUMULATIVE PROBABILITIES FOR THE STANDARD NORMAL
DISTRIBUTION
Entries in the table
give the area under the
curve to the left of the
z value. For example, for
z = .85, the cu
Week 8 Notes
Chapter 9
Steps of Hypothesis Testing1. Develop the null and alternative hypotheses.
2. Specify the level of significance.
3. Collect the sample data and compute the test statistic.
p-val
Week 3
Distributions:
The higher the point the more distribution
Normal is symmetric or same on both sides and is defined by the mean
and standard deviation. The highest point on the normal curve is a
Week 2
PowerPoint is Online
Box Plot:
Graphical summary of data that is based on five-number summary: Low, Q1, Median,
Q3, High)
Easiest to identify outliers
Box is drawn with its ends at the first an
Week 5
Biased: consistently over estimating or consistently under estimating
Unbiased sampling distribution = population mean
Variability:
Low variability tightly packed answers
High variability sprea
Week 5 Notes
Chapter 8
Interval Estimate of a Population Mean: if s is Unknown
X+/- ta/2 (s/ n )
Example:
Sample 16 efficiency apartments
Sample mean - $750 per month
Sample standard deviation - $55
Slides are online!
Email me if you need help: [email protected]
Take Survey on Canvas and See assignment in Module 1 on Canvas
If you bought Cencage or book Sunday or money make sure you g
Week 7 - Notes
Chapter 9
Hypothesis Testing:
Can be used to determine whether a statement about the value of population
parameter should or should not be rejected.
The null hypothesis denoted by HO,
BA 276
10/29/16
Survey and Results
Introduction:
I conducted two survey questions using the online site surveymonkey.com.
One question was Are you currently in a sorority or fraternity? The other was,
BA 276
12/03/16
Average Confidence Interval
Introduction:
I conducted a survey partly using the online site surveymonkey.com and part
by asking for a response from my friends who attend Oregon State.
BA 276
Name:_
Final Exam Form #1 (hand corrected- no need to bubble in on answer sheet!)
Summer 2013
Check here to replace midterm exam grade with grade from this test:
This 110-minute exam consists
Chapter 10: One-Sample Tests of Hypothesis (p. 290)
1. Hypothesis a statement about a population parameter used for testing
2. Hypothesis testing procedure to determine if hypothesis is reasonable
3.
BA 275 Exam 2 Review
Chapter 8
Types of Samples (probability)
o Simple random: a sample selected so that each item/person in the population
has the same chance of being included
o Systematic random:
BA 275 Exam Final Review
Chapter 12: Analysis of Variances (F)
Characteristics
- Family of distributions
- Continuous
- Cannot be negative
- Positively skewed
- Asymptotic
- Test statistic compares t
Chapter 12:
1. F distribution
1. Tests whether two sample are from populations having equal variances
2. Compares several population means simultaneously analysis of variance (ANOVA)
3. Must follow a
Chapter 6: Discrete Probability Distributions (p. 166)
1. Probability Distributions a listing of all possible outcomes of an experiment and
the associated probability of each
1. Discrete: a number, sp
Chapter 9: Estimation and Confidence Intervals (p. 257)
1. Point Estimate a value, computed from sample information, used to estimate
the population parameter
2. Confidence a range of values, construc
Chapter 4: Displaying and Exploring Data (p. 98)
1. Location of a Percentile
1. Lp = (n + 1)* P/100
2. Measures of Position
1. Quartiles: divide a set of data into four equal parts, 3 Qs (Q1, Q2, and
Chapter 3: Describing Data Numerical Measures (p. 30)
1. Measures Location v. Value
1. Location: pinpoint the center of a distribution of data
1. Average: measure of location that shows the central va
BA 276 Midterm
Name_
Summer 2013
Form #1 (make sure you bubble in the form number on your answer sheet!)
Closed Notes
Calculator Allowed
standard normal (z table) allowed (e.g.: http:/www.sjsu.edu/fac
I.
II.
Review Econ 201
a. Specialization
i. Comparative advantage what if your specialty is obscure?
ii. Measuring the value of potential outputs to determine opportunity cost
iii. Use money to conver