Bstat 3321-009
Jaekook Lee
1. Data 1: Annual domestic sales and advertising of Lydia E. Pinkham Medicine Company:
both in thousands of dollars. 1907-1960. (Pankratz, 1991)
Data 2: Advertising and sale
Complement Probability
Q1. According to the 2010 U.S. Census, 37% of women ages 25 to 34 have earned at least a college
degree as compared with 30% of men in the same age group.
a. What is the probabi
Covariance Question
In an attempt to determine whether a linear relationship exists between the price of a home and the
number of days it takes to sell the home, a real estate agent collected the foll
Price of house(X)
Number of days to sell house(y)
Xbar
265
136
225
125
160
120
325
140
430
145
515
121
180
122
423
145
Variance (Sx square)
Sx
variance (Sysquare)
sy
16833.98
129.75
118.79
10.90
Y bar
Midterm Review
Chapter1
1.The role of Inferential statistic is to infer
2. Difference between Sample and population
3. Collection of data set
Which of the following is an example of time series data?
What is stats?
the practice or science of collecting and analyzing numerical data in large quantities,
especially for the purpose of inferring proportions in a whole from those in a
representative sam
Prob
1
The branch of statistical studies called descriptive statistics
summarizes important aspects of a data set.
a. True b. False
2
Sample statistics are used to estimate corresponding population
pa
Use Excel to plot a histogram for the following data and the specified Bin ranges. The current data is uniformally
distributed between 24 and 36 (flat looking histogram). Feel free to generate some ra
BSTAT 3321 -Test
Allowed: ONE Approved formula sheet, calculator, scantron, binomial, poisson, Z and
t tables, and your mind: Nothing else!
Put Test # (top of test) on scantron in the cell
labeled "Te
Questions on First Level Statistics- Some have been omitted that you are not responsible for
1-6 omit
7. A 95% confidence interval for the population average is interpreted to mean that , prior to obt
BSTAT 5325 Exam I Fall, 2016 Version 1 Section 001 - Printed Name_
1. What is the variance of the following population of numbers? 1, 1, 9, 5, 4
a. 11
b. 8
c. 8.8
d. none of the other answers are corr
BLAW Test Review
Ch. 1 Todays business environment
Three branches of government
- Legislative
- Executive
- Judiciary
Separation of powers
As the highest legal authority, the U.S. Constitution overrid
One-Way Analysis of Variance (One-Way ANOVA) Notes
Experiments versus Studies
Types of Experiments
Assumptions & Assumption Checks
Types of Analysis
SAS
When finished with the One-Way Anova notes, you
Confidence Intervals for one mean or proportion
Mean - sigma known
Parameter
proportion
P
Mean - sigma unknown
CI for all differences in means
Tukey
All i- j possible among c s
Estimate
XX
pp
XX
XXi -
One way to prepare your study sheet
1. Read the notes again and determine what your can easily remember and what you cannot.
2. Prepare your study sheet with completely worked examples and any notes t
Assignment 1 Fall, 2017
The dataset you are using is based on the Standard Metropolitan Statistical Area (SMSA) data set found
at http:/www.researchconnections.org/childcare/studies/12. The data in yo
Chapter 5
Random variable: function that assigns numerical values to the outcomes of an experiment
Discrete random variable: a countable number of distinct values
Continuous random variable: uncount
Chapter 1
Descriptive Statistics: Collecting, organizing, and presenting the data
Inferential Statistics: Drawing conclusions about a population based on sample data from that population
Cross-sect
BSTAT 5325 - Exam 2 Version 1 Spring, 2015 Printed Name_
1. What type of model is this: y|x1, x2 = 0 + 1 X1 + 1 X12+ 2 X2?
a. interaction
b. simple linear
c. first-order
d. second-order or quadratic
2
BSTAT 5325 Exam 2 Spring, 2016 Version 1 Wednesday - Printed Name_
1. Which of the following would indicate multi-collinearity?
a. there are outliers and influential points
b. the variance inflation f
BSTAT 5325 Exam 2 Spring 2017 Version 1 Section 001 - Printed Name_
1. Even if the population of Y values is not normally distributed, increases in sample size will help the distribution of the
sample
BSTAT 5325 Exam I Spring 2017 Version 1 Section 001 - Printed Name_
1. The standard for a machine in a manufacturing plant is 50 parts per hour. You believe that the machine 1 is
under-producing. You
BSTAT 5325 Exam 2 Fall, 15 Wednesday - Version 1 Printed Name_
1. If the residual plot versus X shows a curved set of points, you would say that it appears that there is a
violation of _ assumption(s)
BUILDING BLOCK:
1)
Random Sampling - (Same chance) reduce bias and error. Proportions = probabilities.
Random sampling is needed on all we cover.
2)
Sample estimate tend to be in error. (Sample mean p
Regression
Example 4: Suppose you believe that the number of bars your company sells depends on the price
of the bar (measured in cents) and the amount spent on promotion (in dollars). You have record