M~TERM RE~r~EW #2
DUE ~UESDAY JANUARY 17th
Unit 2: Word Problems Study Guide
You must show all work. Set up each problem with let statements, drawin~ pictures, on
charts dependin~ on the problem
1. Mike has four less than two times the number of dollars a
We know that 13% of the population is left handed. A 200 seat auditorium has been built with 15
lefty seats that have been built in desk on the left rather than the right arm of the chair. In a class
of 90 students, what is the probability that there will
1) Undercoverage: some groups in the population are left out of the sample
selection process
2) Nonresponse: individual chosen for a sample wont cooperate or cant be
contacted
3) Bias: a study is biased if it systematically favors certain outcomes
4) Resp
1) Fourprincipalsofexperimentaldesign:
a. Control:wemustcontrolsourcesofvariationotherthanthefactorswearetesting
b. Randomization:allowsustoequalizetheeffectsofunknownoruncontrollablesourcesof
variation
c. Replication:repeattheexperiment,applyingthetreatm
1. The 2-proportion z-interval
You simply do:
q
p$ q
p$
( 1 2 ) z * ( 1 1 + 2 2 )
pp
n1
n2
When do I use this?
When I am given more than one percent.
Note* The assumptions and conditions are the same for a 2-proportion z-test, you just use p in a
confiden
Experimental units: who you run the experiment on
Response variable: running times (for above example)
4 principles in more depth:
o Randomized: must randomly assign treatment
o Replication: have to be able to replicate it and run it exactly the same
way
The first thing you need to know, is that there are two types of data you can be given:
Percents
and
Averages
Note: Anything written on this sheet in pink pertains to percents, and anything on this
sheet written in green pertains to averages.
Example of a
1. The 1-proportion z-test
When do I use it?
When I am given one percent and asked if I think the true percent is actually
greater than, less than, or simply not that percent.
The assumptions and conditions:
1. Independence
2. Randomization (random sample
Unit 2: Word Problems Study Guide
You must show all work. Set up each problem with let statements, drawinq~pictures, or
charts dependinq on the problem
1. Mike has four less than two times the number of dollars as Joe. Between the
two of them, they have $
2013 Final Exarrrlieview Racket: Name
This packet is broken up into 5 parts. K
Part 1: Systems of Equations and Inequalities W
Solve systems ofequations using the graphing, substitution, and elimination methods m
Solve systems ofinequalities
-Solve a 3x3
Mid-Term Review Unit 1
Place These numbers in order from Ieasf rggrearesr
J25 2.232323...
1. Which number'(s) from above are irrarional? 2. Which numbers are imegers?
(3) @713)
3. Simplify The ekpression 2a(3a + 5) 4(a 1) + 2a
.266}... mg AM 4H +
Midterm Review: Pre-Calc topics
~)
Use your forr~ula sheet to answer each question beldw. You may workin groups.
1. Determine the measure of the angles sketehed below
74
2. Convert degrees/radians
a. Convert 225 to radian measure
3. Exact value sine cosin
ENTERMEDIATE ALGEBRA
MIDTERM EXAM REVIEW PART III
ChapTer 2
A. RepresenT RelaTions and FuncTions (2.1)
E. Find Slope and RaTe of Change (2.2)
C. Graph EquaTions of Lines (2.3)
(Tables of Values, InTercest, SlopeInTercepT Form)
MidTerm Review ParT 2
UniTs 2 and 3: Word Problems, InequaliTies and AbsoluTe Value
PercenT Problems
1. Mary spends $135 To purchase a new jackeT. She pays 7.5% sales Tax on The I
purchase. Find The final cosT of The {acket g. g, 5. 107 d 03 my ;
$35 (i.0
Midferm ReView: Special Righ} Triangles and Pythagorean Theorem n ~
V Use special righ: Triagles To solve for x and y
1)x: 33 y: 2)x: Y:-0l
Use Pythagorean Thm. To find The measure of the missing side
3(4)? :CL CIij-flctuujz, V
' ' 8
1.
Simulations
Simulation is a way to estimate probabilities when we are either unable to
determine probabilities analytically or do not have the time, resources, or
money to estimate probability by observation.
Some probabilities associated with gaming (pok