Instructor: Michael Vincent
Office Hours: MWF 10:00 - 10:50; TTh 1:30 - 2:20.
Instructor Website: http:/facweb.northseattle.edu/mivincent/
1. a) A null hypothesis or an alternative hypothesis.
b) Yes. Hypothesis testing means the answer will be either null or alternative, so failing to reject a null
hypothesis means the null hypothesis is true.
c) Yes. Rejecting the null hypothesis means the
1. a. It means 95% of baby pets have a smaller head at birth than your pets head.
b. 94th percentile.
2. a. Test 1 z-score: 1.5; Test 2 z-score: 1; Test 1 was a better score in relation to all the others.
b. 94th percentile.
3. a. 6760000 possible plates.
1. a. H0: = 3.0 GPA
Ha: 3.0 GPA
b. critical values: -1.645, 1.645
rejection regions: to the left of -1.645 and to the right of 1.645
c. z-value: -2.133
outcome: reject the null hypothesis
d. The cumulative mean GPA of all NSC students is less than 3.0.
Numbers Dont Lie: Mean vs. Median The following articles, Entitlement Myths from Time magazine and
Michael Kinsley's Failed Math, Again from The American Prospect illustrate how the choice of measure of
central tendency can be used strategically in matter
Required Homework Assignment Set 1
Spring Quarter 2015
The problems in the assigned exercise sets have been selected to provide you with practice answering the types of
questions you will be asked on the concepts and skills that you wi
MATH&146-Sections D1 and D2
Quiz 1 Answer Key
Some of these answers are much longer than I expect and desire coming from you, e.g., my answers to
#3. I want you to keep your answers to questi
Date June 4, 2015
Spring Quarter 2015
Submit completed quizzes as word or pdf files via email to email@example.com
by 8am, Monday, June 9.
Claim: The cumulative mean grade point average of all North Seattl
January 23, 2014
(From GSFS 35.) A random sample of the miles driven by 20 rental car customers is given:
1. Find the mean of the data.
2. Draw a boxplot.
3. Is the sample
1. A. The test is for mean
H0: <= 4000
H: > 4000
B. small sample: use T-Test
IQR 4819 3951.5 867.5
Lower fence 3951.5 1.5*867.5 2650.25
Upper fence 4819 + 1.5*867.5 6120.25
C. S 1000.85
Due 11:59 pm, Thursday 23rd January
Submit your homework on Oncourse as one .txt or .pdf attachment (not a Word
document or Excel spreadsheet). Show working and give explanations unless otherwise
stated. Collaboration on homework with othe
Section 1.1 23
Every elementary row operation is reversible. TRUE You can
reverse multiplying by a constant by multiplying by its inverse.
If you add row one to row two and replace row two, then you
can subtract row one from row two to get it back.
A 5 6
*Math 220 section 1.1.1
10/7/15, 8:39 PM
1. 4/4 points | Previous AnswersHoltLinAlg1 1.1.008.
Determine which of (a)-(d) form a solution to the given system for any choice of the free parameter.
(HINT: All parameters of a solution must cancel completely w
We can transform a linear system using a sequence of
Section 1.2 Linear Systems & Matrices I
1. Interchange the position of two equations.
Basically, this is reordering the system of equat
1.1: Linear Equations
In general, a linear equation has the form
a1 , a2 , , an and b are constants and
x1 , x2 , , xn are variables or unknowns.
The solution set for a linear equation cons
Chapter 2: Euclidean Space
be a set of vectors in
The set is linearly dependent if and only if one of the
vectors in the set is in the span of the other vectors.
be a set of
The span of this set is denoted
and is defined to be the set of
all linear combinations
can be any real numbers.
then we say tha
Definition: A vector is an ordered list of real
numbers u1 , u2 , , un
The set of all vectors with n entries is denoted
Geometry of Vectors in 2
We plot the vector by
Review for Final Exam
Final exam is on Wednesday, December 10 from 1 3 pm in IB3422
Review Sec. 3.1 3.6 (Differentiation):
Find the derivative of the following:
p(x) = cos x 2x
y = (2 + sin3x)4
y = esin
Problem Set #6
Due Monday, November 24 at 1:15 pm
Show all your work neatly to get full credit.
Fencing is to be added to an existing wall of length 20 feet. How should the extra fence
be added to maximize the area of the enclosed rectangle if
- Problem Set #7 Due Thursday, December 4 at 1:15 pm
Show work to get credit. Problems on front and back page._
1. The function for the standard normal distribution which is often u5ed in statistics, has
the formula: F 2 and the graph as sh