Quiz Practice 3
1. An ANOVA was conducted to compare the mean height increase of patients on 4 different
growth hormone treatments. The test yielded a significant difference in means. When
ranking the means, how many paired-comparisons of means are possib
Quiz Practice 2
1. In a designed experiment to investigate the effects of two factors, Degree Status (B.S. or
B.A.) and Honors Rank (cum laude, magna, or summa), on first-year salary, how many
possible treatments are there?.
A. 2
B. 3
C. 6
D. 8
2. An ANOV
Quiz Practice 1
1. A sample of 150 Publix cashiers showed a mean hourly wage of $ 8.00, with a standard
deviation of $ 1. Give an interval that is likely to contain about 95% of the sampled
cashiers hourly wages.
A. (5, 10)
B. (6, 10)
C. (7, 9)
D. (6, 9)
1
LECTURE #6
* CATEGORICAL DATA ANALYSIS (continued) *
Two-Way Analysis: Two QL variables of interest
Goal is to determine whether on QL variable depends (or is contingent) on the other
Data for QL variables are presented in the form of a Two-way Conting
1
LECTURE #5
* CHAPTERS 6, 7 & 10: CATEGORICAL DATA ANALYSIS *
Data: Categorical (qualitative) in nature
Applications: Allows you to compare proportions of levels of QL variables
One-Way Analysis: One QL variable of interest
QL variable @ 2 levels (S or
LECTURE #4
Now that you know there is a difference in the means, do you stop? NO- Do Follow-Up Analysis
when Reject H0 in ANOVA (Section 9.3): Determine largest & smallest means
Follow-up Analysis: Multiple Comparisons of Means
y
A
= 250.8
y
B
= 261.1
y
LECTURE #3
Small_Sample Inferences (Test or Confidence Interval):
With small samples, we must assume that the target population is normal.
Then we can apply the Students t-distribution- depends on (n-1) degrees of freedom
(Replace "z" with "t" value in b
LECTURE #1:
* CHAPTER 1 (Review) *
Statistical thinking will one day be as necessary for efficient citizenship as the ability to read and
write. H.G. Wells
Data, data, data.Watson, I cant make bricks without clay. Sherlock Holmes
Statistics - the science
LECTURE #2:
* CHAPTER 5 & 6 (Review) *
SIA 5, pg 265:
Can melatonin hormone secreted by a gland in the brain be used to induce
sleep faster? If no drug (placebo), researchers know that =15 minutes.
A sample of 40 males given dosage of melatonin and time
LECTURE #11
Step 4 : Checking Model Adequacy
Bad strategy is to conduct t-tests on all the s, each at =.05.
Why? Suppose model has 10 xs
1) Ho: 1 = 0
2) Ho: 2 = 0 3) Ho: 3 = 0 . 10) Ho: 10 = 0
Overall chance of Type I error is: * = P(Reject Ho at least o
LECTURE #10
Step 5: Use the Model for Estimation and Prediction
1) Estimation - Estimate E(y) for a given value of x with a CI
EX: Estimating mean stock RR for all years in which x=10 (10% market RR)
2) Prediction - Predict y for a given value of x with
LECTURE #7 (Review for exam)
PRACTICE EXAM #1
BACKGROUND INFORMATION:
A business statistics professor does not require, but strongly
recommends, his students to do their homework on the computer. After the first exam, the professor
wants to investigate t
Project 2 M&M experiment
Bruce Wong
STA3024
Wooten
Fall 2015
1. Using a small to king size bag of Plain M&Ms, complete the table below:
1
2. Construct the appropriate graphics for the collected data using this smaller
data
set.
3. Complete the above chart