+
Chapter 12: Significance Test in Practice
Section 12.1
Tests About a Population Mean
The Practice of Statistics, 3rd edition For AP*
STARNES, YATES, MOORE
+ Section 12.1
Tests About a Population Mea
MATH 140: Introduction to Statistics
Instructor: Dr. Jim Bowling
Office: McKinney 245
Office Hours: MWF 3 4pm or by appointment
Ph: 5474
Email: [email protected]dgewater.edu
Text: Understanding Basic Stati
inference about a populations MEAN or comparing two populations MEANS 1 and 2
Population standard deviation is known
Population standard deviation is unknown
One sample
1-sample z-test or z-interval
1
Calculator Exercise to help you understand ways to increase POWER Warning, the calculator can be a bit of
a black box sometimes. This exercise is not a substitute for doing some hard thinking about po
Case Closed 14
1. Step 1: Populations: All healthy women undergoing treatment with in vitro
fertilization or intracytoplasmic sperm injection, and all healthy women
who did not.
Parameters: The propor
Case Closed 14 Does acupuncture promote pregnancy?
1. Populations: All healthy women undergoing IVF or ICSI who receive acupuncture, and all those who do
not.
Parameters: The distribution (proportions
9.3 Sampling Distribution for Sample Means (Distribution of
) Central Limit Theorem
Our goal in this section is to understand the center, spread, and shape of the sampling distribution of . In
this de
Fathom Demo 9.2 Sampling Distribution of the Sample Proportion Pass the Pigs
Rolling a plastic pig is kind of like rolling a die, in that the pig can land in one of six positions.
The pig is unlike th
9.2 Sample Proportions
You flipped a thumb tack n = 5 times and calculated the sample proportion of times it landed points up. In this example
it landed point up 3 out of 5 times for a of 0.6.
Bar Cha
Quiz 7.1
Use the following information for # 1-3.
Let the random variable X be a random number with the uniform density curve given below.
1.
A)
B)
C)
D)
Referring to the information above, P(X = 0.25
By writing my name on this test, I agree to be
bound by Kent Schools statement on Academic
Integrity, which Ive already signed. THIS IS
AND WILL REMAIN MY OWN WORK.
AP Statistics Chapter 7 Test
Name:
1. You are studying alligators in central Florida, and have gathered the following data
on the lengths (in inches) and weights (in pounds) of several alligators captured
there. Because it is easy to e
Case Closed 10 Need help? Give us a call!
1.
The mean response time is 31.99 seconds and the standard deviation is 37.13 seconds. But it is obvious that
the high outliers and extreme right skewness wi
Case Closed 8 Psychic probability.
(a) The proportion of successes for all trials is 88/288 = 0.306.
For high-confidence trials, it is 55/165 = 0.333.
For medium-confidence trials, it is 12/48 = 0.25.
Table:
People who died for myocardial infarction by sex and age group
Sex
Age group
Female
Male
Total
40 to 50 years
598
221
819
50 to 60 years
1020
550
1570
60 to 70 years
774
1069
1843
70 to 80 year
Special Problem 3
Introduction:
In October 2001, National Geographic discovered a huge crocodile-like animal,
dubbed SuperCroc. I am going to predict the body length of the SuperCroc through
analysis
Special Problem 2
Introduction:
This statics is used for a vending machine company to make a recommendation
on the mean number of ounces of beverage that their machines should be programmed
to dispens
Special Problem 1: 2004-05 college tuition
As we all know, college tuition is always rising higher and higher. The cost of college
tuition is rising far more than inflation in some points. This data i
Case Closed 5
1. Study I
a. Study I is an experiment because a treatment had been provided
which is to consume chocolate by pregnant women.
b. No, it is not justified because the pollsters did not pro
Case Closed 4 Its a matter of life and death
1a.
This graph shows the residuals from a linear model for log(premium) and log(age).
Those are the transformations wed make in order to pursue a power mod
Case Closed 3 Are baseballs juiced?
Collection 1
2.4
2.2
2.0
1.8
1.6
1.4
1.2
1.0
0
10
20
30
yr_since_1960
40
1. The above scatterplot shows that for the first ten years, the average number of hone run
Case Closed 2 The New SAT
First, some general notes on trends that I noticed in your papers.
1.(a)
Get out of the habit now of writing out your calculator lingo. No one but you and I know what invnorm
Case Closed 1 Nielsen Ratings
1. Graphical summaries:
NC
B
CS
B
AC
B
See plot of Nielsen ratings for shows on each network below. I chose to make my first graph in Fathom, but
you could have used your