Homework
7-1: #11, 12.17.21
7-2: #116,9 12
7-3: #519, 15 17
Concepts: Confidence intervals for 0 Known
A point estimate is a specific numerical value estimate of a parameter. The best point estimate of
the population mean ,u is the sample mean )f .
Suppos

Spring 2015
Concepts: Confidence Intervals and Hypothesis testing with a z score where a is known:
Assumptions: For this test you need to have a random sample of n 2 30 and 0' known.
Confidence Intervals: SJéQ
a
1. The interval often has bounds: Bounds

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lll [K Chapter 8 Notes
8-2: #7, 9, 12, 17. 20
8-3 #5,7, 13,15,16
8-4 #9, 15
CONCEPTS: Hypothesis Testing (z-test for a mean, 0' is known)
Assumptions:
1. The sample is a random sample.
2. Either 12230 OR the population is normally distributed if

HOMEWORK
2.1, # 7,18 1 3955 Ni
2.2: # 2, 4, 7, 15 to For. N
2.3: # 3,8,11,16,18
2.4: # 9, 11 'J '
Example #1: The table below to the right gives the I late I .
average travel time to work for workers in each state who I 25.1, I
are at least 16 years old

éoucepts: Condence Intervals with Proportions
an
1. The interval has bounds: Bounds = iE (Margin of Error), where E = zl - £9- .
2. For hypothesis testing:
a. Setup hypothesis:
Rim-raucous:
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b. use the test statistic 2:
{Page
I:
Review Part

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C j g
91: #9, 17
9-2: #3.
Clipt Rev: #3 (page 521)
9-3: #5, 9
9-4: #1 1. l4
Concepts: Difference between two means using :resr (0" and 0'2 known)
Asstmtptfons:
, 1. Both samples are random.
2. The samples must be independent of each o

H5 populai t l:- cm
iii-x Putative»: 0w "\_
Chapter 11 Notes
11-1: #9, 12
Concepts: Test for Goodness of Fit
STEP E: State the hypothesis and identify the claim.
STEP 2: Find the critical value. The test is always right tailed.
STEP 3 Compute the test val

Chapter 3 Notes
3.1: #5,9,14,21,27
3.2: #8,9, 19,20, 30 ,
3.3: #ll,13,14,18,19, 30a,b,e X "=7 -x
3.4; #3,9,13, 14 /.1,
Concepts: (Mean, Median Mode, Five Number Summary)
The m_ea§ is another word for average.
The mode is the most frequently occurring. (NO

The chart below gi es some brief statistics a out the br 1 kdown of American sol ' waste and our
' cling habits.
a. Would a pic hart be acceptable
for perc r cycled? Explain.
b. Wh' ercen of glass is NOT recycl d per year?
c. If you were c ating a pie ch

-Chapter 6 Notes Part 2
Homework
6-3: #1], l3, 16,21,22
6-4: #5, 7, ll
Concepts: Central Limit Theorem
Draw an SRS of size n from any population with mean ,u and finite standard deviation
0. The central limit theorem says that when n is large the sampli