Statistics 503-1
Midterm Examination 1
Wednesday, September 22, 2010
Name (please print) :_
This exam is closed-book. You may not consult any notes or books during this exam.
One formula page and distribution tables are provided at the end. Calculators ar
Homework 3 (50 pts)
Due by Thursday, 2/4
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.
1. [learning process checkup] This week we f
Diamond Adamitis
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
Homework 1 (50 pts)
Due 9/3
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.
[PQ] denotes a practical questi
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?
The basic pro
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 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
Problems and Answers for Chapter 5
Introduction to Hypothesis Testing
1. Explain why most researchers are more comfortable rejecting H0 than accepting it. Use a
probability argument in your explanation.
1. When H0 is rejected, the probability of making a
Homework 3 (50 pts)
Due by Thursday, 2/4
1. [learning process checkup] This week we focus on features on population. The major
concepts include sample space, probability model, population mean and standard
deviation/variance.
Primary lecture recording: Bl
STAT 503
Quiz 3 Sept. 12 (10 pts)
Fall 2012
Name: _Key_ Please show your work for all problems. (7 pts.) 1. Studies have shown that the probability that a man washes his hands after using the restroom is 0.74, and the probability that a woman washes hers
\Homework 3 (50 pts)
Due by Thursday, 9/17
1. [learning process checkup] This week we focus on how to describe a random variable and
how it behaves in the corresponding population. The major concepts include sample
space, event, probability model, populat
Homework 5 (50 pts)
Due on Thursday 2/18
1. [Learning process checkup] this week we focus on sampling distribution and Central Limit
Theorem. You will need to understand the difference between the original distribution and
sampling distribution (that is d
Stat 503
Solutions to Homework #1
Problem 2.6
In a study of schizophrenia, researchers measured the activity of the enzyme monoamine
oxidase (MAO) in the blood platelets of 18 patients. The results (expressed as nmoles
benzaldehyde product per 108 platele
Stat 503
Solutions to Homework #10
Problem 10.27 (p. 419)
Consider a fictitious population of mice. Each animal's coat is either black (B) or gray (G) in
colour and is either wavy (W) or smooth (S) in texture. Express each of the following
relationships i
Homework 6 (50 pts, 10 pts each question) Due 7/21
Solution
1. Heat resistance in rice: alternative method.
Rice is one of the most widely consumed grain worldwide. As increasing global
temperatures hamper rice production, scientists are searching for var
Stat 503
Solutions to Homework #11 (115 points)
Problem 12.3 (p. 536)
In a study of protein synthesis in the oocyte (developing egg cell) of
the frog Xenopus laevis, a biologist injected individual oocytes with
radioactively labelled leucine. At various t
Statistics 503-2
Midterm Examination 1
Wednesday, September 26, 2012
Name (please print) :_ANSWER_
Time: 50 minutes
This exam is closed-book. You may not consult any notes or books during this exam.
One formula page is provided at the end. Calculators are
Stat 503
Homework #2 (80pts)
1. (10pts) 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 measurements were converted to F, and the conversion from Celsius to Fahrenheit is y = 1.8 y + 32.
(a) (5
Homework 2 (17.5 pts.)
due Sept. 7
(1 pt.) 2.3.7. The weigh gains of beef seers were measured over a 140-day test period. The
average daily gains (lb/day) of 9 steers on the same diet were as follows.
3.89
3.51
3.97
3.31
3.21
3.36
3.67
3.24
3.27
Determine
Problems and Answers for Chapter 6
One Sample Tests of Hypothesis
1. A plant breeder has been selecting Crispin apple trees for many years in an attempt to decrease
variability in fruit size. When he began selecting, the variance was 400 g2 for mature fru
Diamond Adamitis
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
Frank Kang
STAT 503
March 22, 2012
HW 5
7.4.9
a. No, there are only two observations for Harry Potter books and it is not enough to clarify
whether if the books cause a change in accidents.
b.
7.5.3
a. yes
b. yes
c. yes
d. yes
7.5.8
7.6.7
7.7.2
7.7.6
Sanc
Frank Kang
STAT 503
February 7, 2012
HW 2
3.3.5
It is independent of the wife, because husband could have been a smoker before he was married,
and it is a random chance that a husband may be a smoker or not.
3.5.4
a. 0.189 + 0.027 = 0.216
b. 0.343 + 0.441
Chapter 6
Confidence Intervals
Objectives:
1. To introduce the concept of the standard error and compare it with the
standard deviation
2. To learn how to make and interpret confidence intervals for means
3. To learn how to determine the sample size that
Frank Kang
STAT 503
February 20, 2012
HW 3
6.2.4
a. 0.33
Number of Mice
25
20
15
Number of Mice
10
5
0
[52, 54) [54, 56) [56, 58) [58, 60) [60, 62) [62, 64) [64, 66) [66, 68) [68, 70)
b.
= 60.43
SD = 3.06
SE =
0.33
SD = [57.37, 63.49] SE = [60.1, 60.76]
Frank Kang
STAT 503
January 24, 2012
HW 1
1.2.7
a. It is an experimental study.
b. This study is seriously flawed, because it is biased. It is possible that the plants on west side of the
garden just grew better because they got more sun or more water. Th
Taylor Hornung
Sec. 5
Homework 11 (50 pt) Due 11/17
1. Heat resistance in rice: alternative method.
Rice is one of the most widely consumed grain worldwide. As increasing global
temperatures hamper rice production, scientists are searching for varieties
e
Taylor Hornung
Section 5
Homework 12 (50) Due Tuesday 11/29
1. Monoamine oxidase (MAO) is an enzyme that is thought to play a role in the
regulation of behavior. To see whether different categories of schizophrenic patients have
different levels of MAO ac
Taylor Hornung
Sec. 5
Homework 10 (50pts) Due 11/10
1.
One hundred rats whose mothers were exposed to high levels of tobacco smoke during
pregnancy were put through a simple maze. The maze required the rats to make a
choice between going left or right at
Taylor Hornung Sec. 5
Homework 2 (50 pts)
Due 9/8
1. All human blood can be ABO-typed as O, A, B, or AB, but the distribution of the types varies
a bit among groups of people. Here are the probability model of blood types for a randomly
chosen person in C
Taylor Hornung
Sec. 5
Homework 6 Due 10/6
1. Judys doctor is concerned that she may suffer from hypokalemia (low potassium in the
blood). There is variation both in the actual potassium level and in the blood rest that
measures the level. Judys measured p