STAT2800: Lecture 16
CHAPTER 6: HYPOTHESIS TESTING
Large-Sample Tests for the Difference Between Two
Means (Section 6.5, page 423)
So far, weve only been looking at a single mean, its now time to
extend our knowledge of hypothesis tests on 2 means. Specif
January 30 2005, Lecture 8:
CHAPTER 3: BIVARIATE AND
MULTIVARIATE DATA AND DISTRIBUTIONS
Recap on last class: We started Chapter 3 on Bivariate Data and
found scatter plots along with Pearsons Correlation Coefficient.
Example 3.3 (page 108): Soil producti
STAT 2800U
MIDTERM: February 26, 2015
Section 001(A)
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Instructions:
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written in ink. No white-out is allowed. If a midterm is written
0
STAT 2800U
MIDTERM: MARCH 9, 2016
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INSTRUCTIONS:
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should be written in ink. No white-out is allowed. If a
midterm is written in pencil, you will not be allowed t
STAT 2800U
MIDTERM: February 26, 2015
Section 002(A)
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Instructions:
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written in ink. No white-out is allowed. If a midterm is written
STAT 2800U
MIDTERM: MARCH 8, 2017
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Last Name
Student Number
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INSTRUCTIONS:
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should be written in ink. No white-out is allowed. If a
midterm is written in pencil, you wi
Assignment 2
(Note: dont forget your therefore statements for this assignment)
Exercise 1 (16 marks)
The breaking strength X of a concrete slab has a density function
f ( x) Ae
x
100
dx
for breaking strength values in the range 120 x 150 .
a) Calculate th
Assignment 1
Exercise 1 (6 marks)
A quality engineer measured 75 bolts. The length (in mm)
and the number of flaws on each of 75 bolts is recorded.
(i) identify the variable(s) in the study, (ii) explain the type of
data for each variable in the study (e.
Exercise 2
(a)
The z-score of 90 is
proportion is 0.0228
(90110)
10
= 2.00. The area to the left of z = -2.00 is 0.0228.The
(b)
Let be the required value of the mean. This value must be chosen so that the 1st
percentile of the distribution is 90.The z-sco
Assignment 3
Exercise 1 (10 marks)
One step in the manufacture of a certain metal clamp involves the
drilling of four holes. In a sample of 150 clamps, the average time
needed to complete this step was 72 seconds and the standard
deviation was 10 seconds.
STAT 2800U
MIDTERM: MARCH 7, 2013
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Tutorial Day/Time
INSTRUCTIONS:
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should be written in ink. No white-out is allowed. If a
midterm is wri
BUSI 1450: Statistics
Assignment # 1
Assignment # 1
1. d
2. a
3. d
4.
5. a
6. c
7. a
8. a
9. d
10.
11. a
12. b
13. a
14. b
15. c
16.
17.
18.
a)
b)
c)
d)
e)
f)
g.
Descriptive Statistics
Inferential Statistics
Inferential Statistics
Inferential Statistics
D
Question1:Score1/1
The stemplot along with some summary statistics of the grades of a statistics class are given below. How many of these
scores are identified as outliers?
Corre
ct
Your Answer: 3
Comment:
Question2:Score1/1
With the following boxplot, fi
Question1:Score1/1
In order to be accepted into a prestigious Musical Academy, applicants must score within the top 4% on the
musical audition. Given that this test has a mean of 1,400 and a standard deviation of 170, what is the lowest
possible score a s
Help|ZhiyiYang(100562380)
Quiz2
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STAT2800 (Winter 2017): Online Quizzes, Quiz 2
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Question1:Score1/1
The pdf of a continous random variable is given as
1.
Find P(X < 0.7). (answer to 3 de
FACULTY OF SCIENCE
STAT2800U: Statistics & Probability for
Engineers
Course outline for Winter, 2017
1. Course Details & Important Dates*
Course Type CRN
Day
Lecture
70247
70248
M/W
M/W
Time
Location
9:40-11 am / 8:10-9:30 am
12:40-2 pm / 11:10-12:30 pm
U
STAT 2800U
MIDTERM: MARCH 8, 2017
First Name
Last Name
Student Number
Signature of Student
INSTRUCTIONS:
Use a pen to fill in the front page. All midterm answers
should be written in ink. No white-out is allowed. If a
midterm is written in pencil, you wi
STAT2800: Midterm Review
MIDTERM REVIEW
1. Chapter 1 is pretty straight forward. Please make sure you
understand your simple summary statistics of a raw data set
(i.e.,
, quartiles, etc). Also, please understand the three
graphical summaries: stem and lea
Exercise 1 (10 marks)
Assignment 2
Let X represent the positive difference between the scores obtained from
two dice.
a) Find the probability mass function for X.
b) Show that X follows a valid probability mass function.
c) Find P( X 2) .
d) Find x .
e) F
Statistics and Probability for Engineers STAT2800U
Assignment 10
Due: 2:30 p.m. Monday, 9 April 2012
All answers should be kept to 4 decimal places
1. The Least-Squares Line
From Navidi (3ed), Sec 7.2: #2, #4, #6, #8, #12, #16
2. SAS
From Navidi (3ed), Su
Statistics and Probability for Engineers STAT2800U
Assignment 4
All answers should be kept to 4 decimal places
1. The Binomial Distribution
From Navidi (3ed), Sec 4.2: #2, #6, #8
2. The Poison Distribution
From Navidi (3ed), Sec 4.3: #2, #4, #12, #16, #18
Assignment 1
Exercise 1 (8 marks)
For each of the following settings in Exercise 1, (i) identify the
variable(s) in the study, (ii) explain the type of data for each
variable in the study (e.g., categorical and ordinal, continuous
or discrete, etc.), (iii
Statistics and Probability for Engineers
STAT2800U Winter 2012
*
ANSWER SHEET FOR Assign. No. 7
*
Mark:_/30
FROM SEC 5.3:
#4: circle one ->
NO
#8 (a): the value of the 95% CI lower bound only _3409.29_
#8 (b): the value of the 98% CI critical t only
t
=