STT 231 In Class Activity
1. The length of human pregnancies from conception to birth varies according to the
distribution that is approximately normal with mean 266 days and standard
deviation 16 days.
a) What percent of pregnancies last less than 240 da
"Home On The Range"
Oh, give me a home where the buffalo roam
Where the deer and the antelope play
Where seldom is heard a discouraging word
And the skies are not cloudy all day
Home, home on the range
Where the deer and the antelope play
Where seldom is
SAMPLE QUESTIONS: Hypothesis testing for difference between two means
(independent samples)
Information
Biologist Dr. McLean is an expert on fresh water trout in Gore the trout capital of New
Zealand. She developed a new diet, which she thinks will improv
SAMPLE QUESTIONS: Hypothesis Testing for difference between two
proportions
Information
STT 231 students a few years ago had a theory that the proportion of American made
cars parked in the north campus parking lots is different to the proportion of Ameri
Home Work 4 Answer Key
1. The weights of the eggs produced by a certain breed of hen are normally distributed with mean 65
grams and standard deviation of 5 grams.
(a) What is the probability that one egg selected at random from a hen house will weigh mor
SAMPLE QUESTIONS: Hypothesis testing One Mean
Information
Dr JKL is a mathematician at MSU who thinks that the water flow measured in cubic
feet per second (cf/s) in Red Cedar river has changed drastically in the last decade.
From historical data it is kn
STUDY GUIDE
FINAL EXAM
STT 231 SPRING SEMESTER 2017
1. HELP:
a. Office Hours for Final Exam:
Friday 28th April: 2 to 5 pm.
Monday 1st May: 10am to 1pm and 2 to 6pm.
Tuesday 2nd May: 10am to 1pm and 2 to 6pm.
b. You can also go to STATS help room for he
STT 351: Sec 003 Practice Problems (Exam 3)
April 19, 2017
5.1: 3,9,13
5.2: 23,27,29
5.3: no assigned problems, but know the boxed definitions
5.4: 49,51
7.1: 1,7
7.2: 13,17
7.3:didnt assign any in class, but look at 35 and 38 (from assignment 4)
1
SAMPLE QUESTIONS: Hypothesis testing One Proportion
Information
DRH laboratory discovered a new treatment for a certain disease. This new treatment
was given to 200 randomly chosen patients. Among those treated, the treatment was
successful in 170 patient
"Home On The Range"
Oh, give me a home where the buffalo roam
Where the deer and the antelope play
Where seldom is heard a discouraging word
And the skies are not cloudy all day
Home, home on the range
Where the deer and the antelope play
Where seldom is
April 12 Class Activity Solutions
1. Suppose that the error in the reaction temperature, in oC for a controlled laboratory
experiment is a continuous random variable X having the density function
x2
, 1 x 2
f ( x) 3
0,
elsewhere.
Find
a) P(0 < X < 1).
1
"Home On The Range"
Oh, give me a home where the buffalo roam
Where the deer and the antelope play
Where seldom is heard a discouraging word
And the skies are not cloudy all day
Home, home on the range
Where the deer and the antelope play
Where seldom is
April 24 Class Activity Solutions
1. A production line produces rulers that are supposed to be 12 inches long. A
sample of 49 of the rulers had a mean of 12.1 and a standard deviation of 0.5 inches.
The quality control specialist responsible for the produ
STT 351: Sec 003
Exam III: Thursday (4/20/2017).
Review session on Weds (3/19/2017)
Covers:
5.1: Jointly Distributed Random Variables
5.2 Expected Values, Covariance, and Correlation
5.3 Statistics and Distributions
5.4 Distribution of Sample Mean
7.1 Bas
"Home On The Range"
Oh, give me a home where the buffalo roam
Where the deer and the antelope play
Where seldom is heard a discouraging word
And the skies are not cloudy all day
Home, home on the range
Where the deer and the antelope play
Where seldom is
SAMPLE QUESTIONS: Normal random variable vs Sampling distribution
The first set of 10 questions will be exactly like the questions on Lecture notes
1Normal Random Variable pages 28 and 29.
Example:
1. Find P(Z<1.23)
2. Find P(-1.23 < Z < 1.23)
Of course,
SAMPLE QUESTIONS: Paired Sample Mean
Information
A nutritionist believes that eliminating certain foods from diet can reduce chronic knee
pain. She conducts an experiment on 40 volunteers. For a 4 month period she recorded
the number of occurrences of kne
Canada national anthem
O Canada (English version)
O Canada!
Our home and native land!
True patriot love in all thy sons command.
With glowing hearts we see thee rise,
The True North strong and free!
From far and wide,
O Canada, we stand on guard for thee.
"The Star Spangled Banner"
Oh, say can you see by the dawn's early light
What so proudly we hailed at the twilight's last gleaming?
Whose broad stripes and bright stars through the perilous fight,
O'er the ramparts we watched were so gallantly streaming?
O, say can you see,
By the dawn's early light,
What so proudly we hailed,
At the twilight's last gleaming?
Whose broad stripes and bright stars,
Through the perilous fight,
O'er the ramparts we watched,
Were so gallantly streaming.
And the rocket's red gl
O, say can you see,
By the dawn's early light,
What so proudly we hailed,
At the twilight's last gleaming?
Whose broad stripes and bright stars,
Through the perilous fight,
O'er the ramparts we watched,
Were so gallantly streaming.
And the rocket's red gl
O, say can you see,
By the dawn's early light,
What so proudly we hailed,
At the twilight's last gleaming?
Whose broad stripes and bright stars,
Through the perilous fight,
O'er the ramparts we watched,
Were so gallantly streaming.
And the rocket's red gl
O, say can you see,
By the dawn's early light,
What so proudly we hailed,
At the twilight's last gleaming?
Whose broad stripes and bright stars,
Through the perilous fight,
O'er the ramparts we watched,
Were so gallantly streaming.
And the rocket's red gl
"HUMBLE."
[Music video version:] Wicked or weakness, you gotta see this, waaaaay (yeah,
yeah!)
[Regular version:] Nobody pray for me, it been that day for me, waaaaay (yeah,
yeah!)
Aye, I remember syrup sandwiches and crime allowances
Finesse a nigga with
"HUMBLE."
[Music video version:] Wicked or weakness, you gotta see this, waaaaay (yeah,
yeah!)
[Regular version:] Nobody pray for me, it been that day for me, waaaaay (yeah,
yeah!)
Aye, I remember syrup sandwiches and crime allowances
Finesse a nigga with
"HUMBLE."
[Music video version:] Wicked or weakness, you gotta see this, waaaaay (yeah,
yeah!)
[Regular version:] Nobody pray for me, it been that day for me, waaaaay (yeah,
yeah!)
Aye, I remember syrup sandwiches and crime allowances
Finesse a nigga with