Homework 4
1. My mom says cancer is associated with not getting enough sunshine. Which of
the following graphs would be useful for displaying any potential association
between having cancer (yes or no) and getting sunshine every day (yes or no)?
A. box pl
Solutions 7
Review, one sample t-test, independent two-sample t-test, binomial distribution, standard
errors and one-sample proportions.
(1) Here we debunk a popular misconception about condence intervals and practise obtaining p-values for one-sample sta
Solutions 8
(1) In this question we investigate whether there is a dierence between the mean number
of blue and yellow M&Ms in a fun size bag. To investigate this I am not sure whether
to use matched paired method or two-sample independent t methods to co
Midterm 2 - STAT 301 Section 501/502 Version 1
Spring 2012
1. Do not open this test until told to do so.
2. Turn in your exam with your answers circled when you are done with the exam. You
should not take the exam with you.
3. This is a closed book examin
Solutions 6
(1) In a statistical test about the null hypothesis was rejected. Based on this conclusion,
which of the following statements are true?
(a) A type I error was committed.
FALSE.
When the null hypothesis is rejected (and we accept the null), the
STAT301 Homework 4
In this homework we practice confidence intervals and one-sample tests. We also get some
Statcrunch practice.
(1) A 95% confidence interval for the mean is [10, 18]. How much do I need to increase the
sample size by such that the margin
STAT301 Homework 5
(1) Here we match probabilities to t-transforms.
Using the t-tables find the most accurate probability bounds for the following ttransforms. For example, if I ask for the area to the left of t = 2 for a t-distribution
with 6 degrees of
STAT301 Homework 3
In this homework we consider how to design an experiment correctly (without bias), evaluating normal probabilities and applying the central limit theorem.
(1) A teacher asks her class How many children are their in your family, includin
STAT301 Homework 1
To do the HWs you will need to either use statcrunch in the lab or download it on your
computer.
On my website I have posted the M&M data. Download this data set and upload it into
Statcrunch. Do not hand in the Statcrunch commands (we
STAT301 Solutions 5
(1) Here we have match probabilities to t-transforms.
Using the t-tables nd the most accurate probability bounds for the following ttransforms. For example, if I ask for the area to the left of t = 2 for a t-distribution
with 6 degrees
Solutions 9
(1) A survey was conducted to see whether there is a dierence in the preference of fruit
juices between those living on the East and West coast of the US. 1000 people were
surveyed, each person in the survey lived either on the West Coast of E
Homework 3
1. Outliers affect:
A.
B.
C.
D.
E.
means
ranges
standard deviations
z-scores
All of the above
2. Outliers affect:
A.
B.
C.
D.
quartiles
medians
IQR's
none of the above
3. Jack (a male) is 6'2" (74") tall and Jill (a female) is 5'8" (68") tall.
Homework 2
1. In the year 2000, there were a reported 7,867 cases of whooping cough in the
U.S., while in the year 2002, there were 9,771 cases, according to the CDC.
What might be misleading about concluding from these data that more people
were getting
Chapter 6 Clicker Questions
1. All students in a class were asked how many times they had read the city newspaper in the past
5 days. The data is in the chart below. What proportion read the newspaper more than 3 times
in the past 5 days?
No. Times Read
P
Homework 1
1. An ecologist was interested in how the distribution of fish in a lake was changing
over time. The current study of 1028 fish contained 523 catfish. The ecologist
estimated that 50.9% of the fish in the lake were catfish.
Which of the followi
Homework 1
1. An ecologist was interested in how the distribution of fish in a lake was changing
over time. The current study of 1028 fish contained 523 catfish. The ecologist
estimated that 50.9% of the fish in the lake were catfish.
Which of the followi
Homework 6
1. Corn variety #1 yielded 140 bushels per acre last year at a research farm. This
year, corn variety #2, planted in the same location, yielded only 110 bushels per
acre. Unfortunately, we don't know whether the difference is due to the
superio
Midterm 1 - STAT 301
Spring 2015
Type A
Name:
UIN:
Signature:
1. Do not open this test until told to do so.
2. Turn in your exam with your answers circled When you are done With the exam. You
should not take the exam with you.
3. This is a closed book exa
Final - STAT 301 " -r
Spring 2013
Name:
UIN:
Signature:
Version A:
1. Do not open this test until told to do so.
2. This is a closed book examinatiori, However yOu may use four singlesided sheet of formulas that you
have brought with you and the tables. Y
Midterm 1 - STAT 301 Section 501/502 1
Spring 2012
Name:
UIN:
Signature:
1. Do not open this test until told to do so.
2. Turn in your exam with your answers circled when you are done with the exam. You
should not take the exam with you.
3. This is a clos
Midterm 1 - STAT 301 Section 501/502 3
Spring 2012
Name:
UIN:
Signature:
1.
2.
Do not open this test until told to do so.
Turn in your exam with your answers circled when you are done with the exam. You
should not take the exam with you. '
This i
Midterm 1 - STAT 301
Fall 2013
Name:
UIN:
Signature:
Version A:
1. Do not open this test until told to do so.
2. This is a closed book examination, However you may use one singlewsided sheet of
formulas that you have brought with you and the tables.
STAT301 Solutions 3
In this homework we consider how to design an experiment correctly (without bias), evaluating normal probabilities and applying the central limit theorem.
(1) A teacher asks her class How many children are their in your family, includi
STAT301 Solutions 2
(1a)
(i) I count the number of words on a page. On seven pages the word count is
100, 200, 500, 600, 800, 1300, 1600.
What is the mean and standard deviation for the above data set?
The mean is 728.5714 the standard deviation is 552.91
STAT301 Solutions 1
(1) What sort of variable (either numerical or categorical) is
(i) The type of cycle a person owns.
Categorical
(ii) The height of a person.
Numerical
(iii) The gender of a person.
Categorical
(iv) A questionaire where the participant
Midterm 1 - STAT 301 Section 501/502 1
Spring 2012
Name:
UIN:
Signature:
1. Do not open this test until told to do so.
2. Turn in your exam with your answers circled when you are done with the exam. You
should not take the exam with you.
3. This is a clos