Valencia College
Name: Wilkens Brisenold
Workshop 2
Prof. Calcano
Complete the blank or answer true or false.
1. The correlation coefficient measures the strength and direction of the association
between two different variables.
2. In an inverse relations
SOLUTIONS TO REVIEW FOR TEST 3
1a.
is the average age of all people placing personal ads in the local paper.
1b.
is the average age of the sampled people placing personal ads in the local paper.
1c.
Indep: one persons age wont affect anothers.
Random Sa
Reading Questions Chapter 12
Name Marlon Ffrench (STA 2023 TR 8:30)
Read Chapter 12 and answer the questions below. Submit in class. This will count for 10 points.
1. Based on pages 305 308 describe the basic difference between an observational study and
Name Marlon Ffrench_
GPA Project
The GPA's for all West Campus students who have completed at least 30 credit hours have been
provided for you (in Blackboard). Use the random number generator on your calculator (you can
also find these on the internet too
TI-84 Plus family of graphing calculators
Test preparation: Resetting
all memory
Use this method when exams require clearing all calculator memory. Clearing all memory deletes all programs and
deletes all calculator applications (apps).
IMPORTANT: Resetti
Student Name _
Date _
CIRCLES*
MYP Level 2
S o l v e e a c h p r o b l e m . S h o w a l l w o r k . W h e n n e c e s s a r y, r o u n d a n s w e r s t o t h e
hundredths place. Remember your units. Use the approximation
1 . A n n e i s ri d i n g a h o
Study Chapter 2 to 5 homework, In Class worksheets, and this Review handout practice problems for the
exam.
Ch2-5 Test Review
1. Use contingency tables to find percentages, marginal distribution and conditional relative
frequency distribution.
2. Find the
Chapter 7
Survey Sampling
and Inference
Chapter 7, Slide1-1
1
Chapter 7 Topics
Discuss survey quality and identify possible
sources of bias in surveys
Use the Central Limit Theorem for Sample
Proportions to construct confidence intervals
Chapter 7, Slid
Chapter 3
Numerical
Summaries of
Center and
Variation
Chapter 3, Slide 1
Chapter 3 Topics
Summaries for center and spread in:
Symmetric distributions: Mean and standard
deviation
Skewed distributions: Median and IQR
Other summaries for variation (vari
Chapter 4
Regression
Analysis:
Exploring
Associations
between
Variables
Chapter 4, Slide
1-11
Chapter 4 Topics
Explore associations between numerical
variables graphically and numerically
Model linear trends using a regression line
Chapter 4, Slide
1-22
Chapter 2
Picturing
Variation with
Graphs
Chapter 2, Slide 1
Chapter 2 Topics
Visualizing variation in numerical and
categorical data
Summarizing important features in numerical
and categorical distributions
Chapter 2, Slide 2
Section 2.1
VISUALIZING VA
Chapter 8
Hypothesis
Testing for
Population
Proportions
Chapter 8, Slide
1-11
Chapter 8 Topics
Conduct hypothesis tests involving one and
two population proportions
Chapter 8, Slide
1-22
Section 8.1
THE ESSENTIAL INGREDIENTS OF
HYPOTHESIS TESTING
Write
Chapter 6
Modeling
Random
Events: The
Normal and
Binomial
Models
Chapter 6, Slide
1-11
Chapter 6 Topics
Distinguish between discrete and continuous
random variables
Apply a Normal model to find probabilities
Chapter 6, Slide
1-22
Section 6.1
PROBABILITY
Review Exam 3
I. Confidence Intervals
Formula:
sample estimate confidenceFactor*SE
For means use t* and for proportions use z* as the multiplier.
interpret interval in context
Check appropriate conditions ( when asked)
II. Hypothesis Tests
samplevalue ! n
Honors Statistics
Fall Term 2010
Course:
STA 2023 Statistical Methods (3 credit hours)
Text:
Stats Modeling the World (3n d Edition) by Bock, Velleman, De Veaux
(ISBN 0-321-57044-8)
Instructor:
James Lang
Office: 4-235
Phone: 407-582-2490
Email: [email protected]
Statistics Quiz 7
It is due at the beginning of the period on Thurs. Nov 11.
Annual surveys are conducted on college grads to determine the starting salary. In a Fall
2007 report the mean starting salary for accounting majors was $47,000 with a standard
d
1.
Recap chapter 18
When cars are manufactured the gas mileage will vary from car to car. Suppose that the
mean gas mileage for all cars of a certain model is 25 miles per gallon (mpg) and the
standard deviation of the mileages for this model car is 2 mpg
Review Exercises
Before doing calculations:
A) Identify problem type: mean or proportion? one population or two ?
Conf. Int or Hyp. test?
B) Write a sentence defining the parameter (no numbers;not sample)
C) Write the formula for the SD (or SE ) of the sa
STA 2023
Statistics
Reading Questions Chapter 13
Name_
Read Chapter 13 and answer the question below. Turn this in at the beginning of the
class next week. This will count 10 points on the project (hand-in) part of your grade.
1. Based on pages 292 to 295
Reading Questions for Chapter 12
Read chapter 12 in preparation for class next time. Answer the following questions and
turn them in at the beginning of class. This will count as 5 points in your hand in
component of your grade.
1. List the three big idea
STA 2023
Project 1
Statistics
Rainfall Data
The data shown below is the annual rainfall, measured in inches, for Orlando from 1973
to 2005.
45
46
46
38
51
50
41
46
52
55
45
46
50
56
54
46
32
61
54
41
66
54
49
55
44
50
29
49
64
40
41
59
1.
What is the who?
Normal Curve Calculations
The Empirical Rule that we have applied to bell-shaped distributions is based on a special
mathematical distribution called the normal distribution. The normal distribution is
symmetric about the mean . The standard deviation des
Hypothesis Testing Examples
About 10% of the general population is left-handed. A researcher speculates that artists
are more likely to be left-handed than people in the general population. The researcher
takes a random sample of 150 artists finds that 26
GPA Project
1.
The GPA's for session 2 2001 of all East Campus students who have completed at least 30
credit hours are on reserve in the library and online at
http:/eastlrc.valenciacc.edu/faculty/langj/Stat/studentdata.pdf .
(Or on Valencia homepage go t
Regression Exercise
The table lists the number of people living on American farms (in millions of people) for
years from 1935 to 1980.
Year
1935
1940
1945
1950
1955
1960
1965
1970
1975
1980
Farm Pop
32.1
30.5
24.4
23.0
19.1
15.6
12.4
9.7
8.9
7.2
A)
Make a
Rev. F08
STA 2023
Module 12
Inferences for Population
Proportions
Learning Objectives
Upon completing this module, you should be able to:
1.
2.
3.
4.
Find a large-sample confidence interval for a population
proportion.
Compute the margin of error for the
Rev. F08
STA 2023
Module 11
Inferences for Two Population
Means
Learning Objectives
Upon completing this module, you should be able to:
1.
2.
Perform inferences based on independent simple random samples
to compare the means of two populations when the po
Rev. F08
STA 2023
Module 10
Hypothesis Tests for One
Population Mean
Learning Objectives
Upon completing this module, you should be able to:
1.
2.
3.
4.
5.
6.
Define the terms associated with hypothesis testing.
Choose the null and alternative hypotheses