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
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 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 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 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 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
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 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 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 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
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 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.
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
Statistics 503, Midterm, Thursday 10/22/2015
Time: 90 minutes
Name (please print): _
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 problem, even if the f
Statistics 503, Midterm, Thursday 3/12/2015
Time: 90 minutes
Name (please print): _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 problem, ev
Cami Senior
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 dat
Cami Senior
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, pvalue, power, confidence interval etc. But we sta
Homework 10 (50 pt) Due on Thursday 11/12
1. [Learning process check-up] This week we continue the topic on hypothesis test
of one categorical variable (sample) and start the topic on investigating the
relationship between two categorical variables (sampl
Homework 10 (50 pt) Due on Thursday 11/12
1. [Learning process check-up] This week we continue the topic on hypothesis test
of one categorical variable (sample) and start the topic on investigating the
relationship between two categorical variables (sampl
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
Example 1.1.5: Food Choice
Example 1.2.1: Lightning and Deafness
On July 15, 1911, 65 year old Mrs. Jane Decker was
struck by lightning while in her house. She had
been deaf since birth, but after being struck, she
recovered her hearing, which led to a he
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?
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
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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
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
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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
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.
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:
sh is
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Homework 8 (50pts) Due 3/24
1. [Learning process checkup] This week we focus on Power analysis and Two-sample
hypothesis test: independent design. We review hypothesis test concepts: definition, pvalue, power, confidence interval etc. But we start to focu
Homework 7 (50 pts)
Due on Thursday 3/3
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 compute the p-value.
Primary lecture recor
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 4
(50 pts)
Due 7/7
1. A researcher is looking at the relative abundance of microbiota in the guts of wild chimpanzees in
Cameroon. He randomly selects 25 chimpanzees from the population and analyzes their fecal
samples for microbiota abundance. T