Stat1600
Midterm #1
October 7, Form A
Name:
Note: Z Table is attached (page 4).
1. On the average, a watch battery is known to last for 2 years (24 months), with a standard deviation of
8 months. Assu
Stat1600
Midterm #1
Solution, Form A
1. The high temperature on Jan 30th (in F.) for the last 5 years in a northern U.S. city is as
follows:
23,30,25,24,28
(a) (10 points) Calculate the mean, X of thi
Stat1600
Midterm #2
November 16, Form A
Name:
Note: Tables are attached (pages 5).
1. According to the 2009 current Population Survey conducted by the U.S. Census Bureau, 40% of the
U.S. population 25
Stat1600
Midterm #2
Solution to Form A
1. Of 100 adults selected randomly from one town, 64 have health insurance. A researcher
wants to construct a 95% condence interval for the percentage of all adu
S160 #10
The Binomial Distribution, Part 2
JC Wang
February 13, 2014
TV World Example, revisited
Recall that, in TV World Example, historical data shows that
20% of TV buyers at TV World purchase exte
Stat1600
Midterm #1
Solution, Form B
1. The high temperature on Jan 30th (in F.) for the last 5 years in a northern U.S. city is as
follows:
24,28,25,23,31
(a) (10 points) Calculate the mean, X of thi
S1600 #8
The Normal Percentile
January 30, 2014
Revisiting TV+More Example
Question 2
Assumption: demand follows normal (bell-shaped) curve with
mean 36 and SD 8 TV sets per month. Given the cost of
r
Stat1600
Solution to Midterm #1, Form A
1. Fred is in a weekly golf league. His scores from the last n = 21 weeks are shown in the
stem and leaf plot below:
-Leaf Unit = 1
7 6778
8 012349
9 01255
10 0
S160 #9
The Binomial Distribution, Part 1
JC Wang
February 11, 2014
Binomial Process and Binomial Random Variable
A sequence of (xed) n observations is called a binomial
process if
each observation re
S1600 #5
Estimates of Center
January 21, 2014
Importance of Location and Spread
Comparison Boxplots
of Two Payment Types
Rent
Mortgage
500
1000
1500
2000
Monthly Payment
upon inspecting the plot, the
Stat1600
Final Exam
Solution, Form A
1. (10 points) In a study of facial behavior, people in a control group are timed for eye contact
in a 5-minute period. Their times are normally distributed with a
WORKSHOP 9
Submitted by:
According to the 2008 Current Population Survey conducted by the US. Census Bureau, 30%
of the U.S. population 24') years old and over have completed a bachelors degree
S1600 #1
Syllabus; Knowledge and Data
January 7, 2014
Course Home Page
www.stat.wmich.edu/wang/160
Lectures
lecture and workshop
50-minute lecture
25-minute hands-on workshop
10 points for each days w
S1600 #2
Data Presentation #1
January 9, 2014
Statistics and Data
Statistics
Broader sense: collection of techniques/procedures for
analyzing data, i.e., Statistics = Data Analysis
Narrower sense: sta
Stat1600
Final Exam (December 2010)
Form A
Name:
Note: Tables are attached (pages 5 & 6).
1. (10 points) A study was conducted in order to determine if any link existed between cellular phone
usage an
S1600 #4
Data Presentation #3
January 16, 2014
Five-number Summary
Payment (Rent/Mortgage, outlier excluded), ACS Data
n = 63
(n + 1)/4 = 16
1st quarter of the data2nd
quarter of the data3rd quarter o
S1600 #7
The Normal Distribution
January 28, 2014
TV+More Example (page 38)
Assumption: demand follows normal (bell-shaped) curve
with mean 36 and SD 8 TV sets per month, evidenced by
past observation
S1600 #6
Estimates of Spread
January 23, 2014
Estimates of Spread (or Uncertainty, Variation)
an estimate of spread is a measure of uncertainty, or
variation, or give or take
when two or more comparab