Homework 11 (50 pt) Due Thursday, 4/16
[Learning process checkup] This week we continue the topic on ANOVA, specifically, multiple comparison
and two way ANOVA.
Primary lecture recording: Topic 14 and 15
1. [Review question]Figure 26.7 shows two made-up p
Stat 503 Homework 13 (50pt) Due Thursday 12/10
[Learning process checkup] This week we focus on correlation and linear regression.
Lecture recording: Topic 17
[Review question 1] Sketch two scatter plots, where one shows (approximately) r
2
2
0.3 , r =0.
Stat 503 Homework 13 (50pt) Due Thursday 12/10
[Learning process checkup] This week we focus on correlation and linear regression.
Lecture recording: Topic 17
[Review question 1] Sketch two scatter plots, where one shows (approximately) r
, and the other
Stat 503 Homework 12 (50pt) Due Friday 5/1
1.[Learning process checkup] This week we focus on correlation and linear regression.
Lecture recording Topic 17.1-4
[Review question 1] What is the data model for linear regression? Explain with an
example.
Y (c
Homework 11 (50 pt) Due Thursday, 4/16
[Learning process checkup] This week we continue the topic on ANOVA, specifically, multiple
comparison and two way ANOVA.
Primary lecture recording: Topic 14 and 15
1. [Review question]Figure 26.7 shows two made-up p
Statistics 503, Midterm, Thursday 3/12/2015
Time: 90 minutes
Name (please print): _Solution _Class time
_
Show all your work and calculations for long computation questions. Points will be deducted
when a) false statements are shown in the solution to a p
Homework 6 (50 pts)
Due 2/25
1.! [learning process checkup] This week we focus on confidence interval, specifically when
1. Sigma is known (the Z-method) and 2, sigma is unknown (the T-method)
Primary lecture recording: topic 7
Launchpad>assignment>chapte
Homework 5 (50 pts) Due on Thursday 10/1
a) [learning process checkup] This week we focus on sampling distribution and Central
Limit Theorem. You will need to understand the difference between a general
distribution (original distribution) and sampling di
Homework 7 (50 pts)
Due on Friday 10/16, an unusual due day
1. [Learning process checkup] This week we focus on Hypothesis test. You will need to understand
how to define Ho/Ha, find the test statistic, define the reject region, and understand the p-value
Homework 6 (50 pts)
Due 10/8
1. [learning process checkup] This week we focus on confidence interval, specifically when
1. Sigma is known (the Z-method) and 2, sigma is unknown (the T-method)
You learn to understand what is margin error (ME); how to contr
Homework 8 (50pts) Due 3/26
[Learning process checkup] This week we focus on Two-sample hypothesis test: independent and
dependent design. We review hypothesis test concepts: definition, p-value, power, confidence
interval etc. But we start to focus more
Homework 11 (50pt) Due on Thursday 11/19
[Learning process checkup] This week we focus on hypothesis test on two categorical
variables: contingency tables, and start the topic on one-way ANOVA. Two case studies are
covered this week: Lister and Priority.
Homework 9 (50pts) Due 11/5
[Learning process checkup]
Part I. This week we continue to learn the two-sample T test, with either independent or
dependent two sample groups. The assumptions for the two-sample T test are:
1. Each sample is randomly and inde
Homework 8 (50pts) Due 10/29
[Learning process checkup] This week we focus on Power analysis and Two-sample hypothesis
test: independent design. We review hypothesis test concepts: definition, p-value, power,
confidence interval etc. But we start to focus
Homework 9 (50pts) Due 11/5
[Learning process checkup]
Part I. This week we continue to learn the two-sample T test, with either independent or
dependent two sample groups. The assumptions for the two-sample T test are:
1. Each sample is randomly and inde
Homework 3 (50 pts)
Due by Thursday, 9/17
Note: please keep at least three (non-zero) decimal places during your computation, and keep
two decimal places at the final answer, and then highlight the final answer.
[Learning process checkup] means concept re
Homework 10 (50 pt) Due on Thursday 4/7
1. [Learning process check-up] This week we study categorical variable. Confidence
interval and hypothesis test on one and two categorical variables.
Primary lecture recording: Topic 11.2, 12.1, 12.2, 12.3. (Note th
Cami Senior
Homework 2 (50 pts)
Due by Thursday, 9/10.
1. [learning process checkup] This week we focus on computing probability for single and
multiple event.
a) Primary lecture recording: topic 3.1-3.3
[Question]: what are the basic probability rules?
Homework 4 (50 pts)
Due by Thursday, 9/24
1. [learning process checkup] This week we focus on two most important population
distributions: Binomial and Normal, and learn how to compute the population mean and
variance and how to decide the data satisfies
Homework 2 (50 pts)
Due by Thursday, 9/10.
Note: please keep at least three significance (non-zero) decimal places during your computation,
and keep two significance decimal places at the final answer, and then highlight the final answer.
[Learning proces
Stat 503
Solutions to Homework #9
Problem 10.4 (p. 400)
At a Midwestern hospital there were a total of 932 births in 20 consecutive weeks. Of these births, 216 (15)
occurred on weekends. Do these data reveal more than chance deviation from random timing o
Stat 503
Solutions to
Homework #7 (83 points)
Problem 7.25
For each of the following situations, suppose H0: 1 = 2 is being tested against HA: 1 2. State
whether or not H0 would be rejected.
(a) P-value = 0.085, = 0.1.
H0 would be rejected.
(b) P-value=0.
(8) (4) (8)
Stat 503 Div
Solutions to Homework #6 (32 points)
Problem 6.42
In a study of human blood types in nonhuman primates, a sample of 71 orangutans were tested and 14
were found to be blood type B. Construct a 95% confidence interval for the relati
Homework 5 (50 pts) Due on Thursday 10/1
a) [learning process checkup] This week we focus on sampling distribution and Central
Limit Theorem. You will need to understand the difference between a general distribution
(original distribution) and sampling di
(5) (2) (2) (2)
Stat 503 Solutions to Homework #6
(49 points)
(2)
Problem 6.3
In evaluating a forage crop, it is important to measure the concentration of various constituents in the
plant tissue. In a study of the reliability of such measurements, a batc
Example: Samples and Variables
For each of the following, identify the variable(s)
of interest, the type of variable, the
observational unit (or case) and the sample size.
(1) Number of petals of 20 rose flowers
(2) Survey question about whether to have m
Example 8.1.1: Paired Design
Doctors studying
healthy subjects
measured myocardial
blood flow (MBF)
during bicycle
exercise before and
after giving the
subjects a dose of
caffeine that was
equivalent to drinking
two cups of coffee.
Example: Paired Hypothe
Stat 503
Solutions to Homework #2 (32 points)
Problem 2.57
The mean and SD of a set of 47 body temperature measurements were as follows:
y = 36.497 C
s = 0.172 C
If the 47 measurements were converted to F,
(6)
(a) What would be the new mean and SD?
The co
Example: Statistical Estimation
Consider taking a sample of size n from a large
population of seeds of the princess bean
(Phaseotus vulgaris) and record the seed weights.
If our sample size is 20 and found the mean = 475
mg and s = 75 mg. What is SE?
Diff
Example: Contingency Table
Contingency Tables: Context 1
Samples are drug and placebo ; observed
variable improve or dont improve
Observed
Treatment
Drug
Placebo
Total
Improve
15
4
19
Dont Improve
11
17
28
Total
26
21
47
Contingency Tables: Context 2
Obse
Statistics 503, Spr17 Midterm exam SOLMTI 0A,)
Time: 90 minutes
Name (please print): Section (02/04/online)
Show all your work and calculations for long computation questions. Points will be deducted
when a) false statements are shown in the solution to a
Homework 7
(50 pts)
Due 3/3
Important: please review the supplementary reading on Hypothesis Testing before doing this homework.
1. On average, high school juniors who retake the SAT exam as seniors improve their
Mathematics score by 13 points. One profes
Homework 10 (50pts) Due 4/7
1. Saving birds from windows. Many birds are injured or killed by flying into windows. It
appears that birds dont see windows. Can tilting windows down so that they reflect earth rather
than sky reduce bird strikes.7 Researcher
Homework 7
(50 pts)
Due 3/3
Important: please review the supplementary reading on Hypothesis Testing before doing this homework.
1. On average, high school juniors who retake the SAT exam as seniors improve their
Mathematics score by 13 points. One profes
Homework 9 (50 pt)
Due 3/31
1 One model scientists are investigating in relation to finding a cure for cancer is that there is a
presence of cancer stem cells which are resistant to drugs and they divide indefinitely. Targeting
these cells is one of the h