Joy of Statistics Reflection
1
Joy of Statistics Reflection Paper
Brianna N. Lynch
The University at Buffalo
Joy of Statistics Reflection
2
The use of statistics helps us understand and get a sense the world in which we live in.
Hans Roling is a swedish p
HW1B
1. Suppose that we were determining the effects of smoking on heart disease. We found that amongst smokers in a
certain age range, a proportion of .6422 with heart disease and amongst non-smokers we had a proportion of .0772 with
heart disease. Deter
Turn in HW 1
Name _
Class Number _
1. Suppose that we were determining the effects of smoking on heart disease. We found that amongst smokers in a
certain age range, a proportion of .4173 with heart disease and amongst non-smokers we had a proportion of .
Minitab 7
The Central Limit Theorem predicts that the mean of C50 should be 4.5
and the standard deviation is close to
or
or 0.3711.
Besidesaskewedrightside,C21moreorlesslookedlikeauniformdistributionwithsome
outliersonthehigherend.However,itwasnotevenclo
Minitab 3
C1
C2 (C1+10)
C3 (C1*10)
For the first change, upon adding 10 to the data, the overall shape of the spread does not
change. Essentially it just moves the center of the data, both the mean and the median, as well
as the location of the data, firs
Minitab 2
There are definitely both very interesting ways to plot data. One of the biggest differences is
how a histogram will show the frequencies of certain groupings of data, while the boxplot only
shows the main points like median and first and third
Minitab 1
The data spread created looked about right for a sampling of 100 things. I was certainly
surprised about the general facts of the spread it completely makes sense for the mean to be
within 4-5 for variables of 0-9, but I was more interested in h
Minitab 5
The theoretical probability value of getting a club from a deck of cards is 13/52 =
While the three columns seemingly vary quite a bit, the larger the sample, the more accurate
each following column becomes. Technically, the rate for 1-4 should
Minitab 4
The three types of data presentations: Box, Stem and Histogram each have different
characteristics. The Boxplot seemingly is the least specific, rather than giving individual points it
simply shows the range of points from high to low, then give
Homework 20 A
Name_
Class Number_
1. Company A claims that their tires outlast the tires of Company B by more than 10,000 miles. Data has been
collected and summarized below: Test the claim at the .05 level assuming normality and equal variances.
Company
Homework 19 A
Name_
Class Number_
1. A government official wishes to know what percent of the adult population favor a new gun control law. A
referendum is going to be voted on in the next election. For the gun control measure to pass, more than 60% of
th
Homework 16 A
Name_
Class Number _
1. A manufacturer of parts wants to estimate the amount of variation in the manufacturing process. A sample of
12 parts is measured and used to calculate x 197.6 and s .68 . Use this information to determine
a) a 98% con
Metropolitan area
Washington, D.C.
Seattle
Baltimore
Boston
Denver
San Francisco
San Diego
Sacramento
Los Angeles
Chicago
Philadelphia
Minneapolis
New York
Atlanta
Dallas
Phoenix
Portland
Cincinnati
Houston
Columbus
St. Louis
Miami
Detroit
Cleveland
Tampa
RUNNING HEAD: STATISTICS IN BUSINESS
Statistics in Business
By Amelia Swanson
QNT/275 Statistics for decision making Dr. Sudesh Kannan
1
STATISTICS IN BUSINESS
Statistics in Business
Statistics is the collection, analyzation, and interpretation of data in
Comments
To evaluate the business health as a creditor, I have checked
Existing Debt
Obligations
Cash Flow
Income
Profit
Expenses
:Testing cash liquidity/profitability/efficiency; we shall refer to
:Current ratio -1
To measure Edita's ability to pay off i
Student Number 37 Base 20754
Name Evan Section B
Schweigel
1. Mean= 99.296 Standard Deviation= 6.220
2.
Dotplot of Schw1
84
88
92
96
100 Schw1
104
108
112
3.
Histogram of Schw1
Normal 14 12 10 F requency 8 6 4 2 0
Mean StDev N 99.30 6.22
Student Number 37 Base 20754
Name Evan Section B
Schweigel
Hist ogramof S chw1
Exponential 140 120 10
Mean N 10.16 500
Frequency
100 80 60 40 20 0
0
10
20
30
40 Schw1
50
60
70
37
Statistics 119
Minitab
Assignment #5
Evan Schweigel
Evan Schweigel
Minitab #5
Due: 3/21/06
Class # 37
32182169
37
Introduction
One day a friend proposes a seemingly good-natured, fair wager to you. He pulls
a coin out of his pocket and tells you the r