4) A shortage of candidates has required school districts to pay higher salaries and offer extras to
attract and retain school district superintendents. The following data show the annual base salary
($1000s) for superintendents in 20 districts in the gre
5) A survey of magazine subscribers showed that 45.8% rented a car during the past 12 months
for business reasons, 54% rented a car during the past 12 months for personal reasons, and 30%
rented a car during the past 12 months for both business and person
7) According to the Ameriprise Financial Money Across Generations study, 9 out of 10 parents
with adult children ages 20 to 35 have helped their adult children with some type of financial
assistance ranging from college, a car, rent, utilities, credit-car
Business Statistics I
University of Belize
Assignment #3
Name: _
Date: _
Show all working and be confident!
1) A hamburger shop sells hamburgers with cheese, relish, lettuce, tomato, onion, mustard, or
ketchup. How many different hamburgers can be concoct
Business Statistics I
University of Belize
Lecturer: Ms. Arieni Arzu
Assignment #2
Name: _
Date: _
Show all working and be confident!
1) The Los Angeles Times regularly reports the air quality index for various areas of Southern
California. A sample of ai
Business Statistics I
University of Belize
Lecturer: Ms. Arieni Arzu
Assignment #1
Name: _
Date: _
Show all working and be confident!
1) A Business Week North American subscriber study collected data from a sample of 2861
subscribers. Fifty-nine percent o
Business Statistics I
University of Belize
Lecturer: Ms. Arieni Arzu
Practice Question
1) Dentists use of anesthetics. Refer to the Current Allergy& Clinical Immunology (Mar. 2004)
study of the use of local anesthetics (LA) in dentistry. Recall that the m
Practice Question
1) Give the percentage of measurements in a data set that are above and below each of the
following percentiles:
a. 75th percentile
b. 50th percentile
c. 20th percentile
d. 84th percentile
2) Compute the z-score corresponding to each of
Statistics
Problem Set 3- SOLUTIONS
Igor Karagodsky
SOLUTIONS
Problem Set 3
1) Uniform Distribution
a. If a random variable, X, has a uniform distribution over the values 10 to 15, what
does f(x) equal? Draw the diagram.
f(x) equals 1/5.
cfw_We know this
Spring 2016
ENG EK 131 B4:
Applications
Human Brain Mapping and Clinical
(Jan 20-March 2)
Instructor: Professor Lucia M. Vaina [email protected]
Office: ERB 315 (44 Cummington Mall)
Office Phone: 617-353-2455
Office Hours: Weds 12-1 pm or by appointment
Course
EC151.02: Statistics
EXAM 2- SOLUTIONS
Fall 2013
Question 1: Various Quick Questions (30 points)
1) Probability
a. (4 pts.) Suppose zi ~ N(0, 1). What is the probability that zi < -1.61?
Pr(zi < -1.61) = Pr(zi > 1.61) = 1 - Pr(zi 1.61) = 1 - .9436 = .0537
EC151.02: Statistics
EXAM 1- SOLUTIONS
Fall 2013
Question 1: Results of the Boston Preliminary Election for Mayor, 2013 (36 pts.: 4 pts. each)
The scatterplot in Data Appendix 1 shows results from the 2013 preliminary election for Mayor in
Boston across t
EC 1151.02: Stats for . Econ
SOLUTIONS
Cichello
Some People find Summation Notation Puzzling Are you one of them?
Weve all played these types of games. Your goal is to find a secret message. You will need to
use the summation notation and some basic addit
Chapter
2-1
2
2-2
2.1 The Role Technology Plays
in Statistics
Microsoft Excel has built-in options for data
presentation and statistical analysis
You may need to activate Excels Analysis Tool
Pak Add-in to see these options
2-3
Statistical Analysis Usin
Chapter
1-1
1
1-2
1.1 Business Statistics and Their Uses
Statistics
the mathematical science that deals with the collection,
analysis, and presentation of data, which can then be
used as a basis for inference and induction
1-3
Business Statistics and The
Statistics
Problem Set 2: SOLUTIONS
Igor Karagodsky
SOLUTIONS
Problem Set 2
Question 1
Imagine you go for a visit to the Institute of Contemporary Art (ICA) in Boston. 60% of the
pieces of art displayed at the current exhibition are paintings (P), 25% are
Section 2.1: For exercise 5-8, find the class boundaries, midpoints, and widths for each class.
5.
43-47
o
o
o
6.
125-131
7.
Class boundaries: 125 0.5= 124.5 , 131 + 0.5= 131.5
Midpoints: Xn= lower boundaries + upper boundaries /2 = 124.5 + 131.5 / 2= 128
What is the difference between cluster and stratified sampling? Give an example of each and
respond to at least two of your classmates' postings.
The difference between cluster and stratified sampling is a cluster uses all members in the
sections in which
MAT 150WB Special Assignment for Sections 8.4 8.5
1) The listed values are waiting times (in minutes) of customers at the Jefferson Value Bank,
where customers enter a single waiting line that feeds three teller windows. Test the claim
that the standard d
MAT 150 Special Assignment for Sections 7.3 and 7.4
1) An insurance company checks police records on 582 accidents selected at random and
notes that teenagers were at the wheel in 91 of them. Create a 98% confidence interval
for the percentage of all auto
Exercises 3-1
1. Calories in Salads are salads a healthy menu choice? Listed below are the number of calories in
selected entre salads at several popular restaurants. Find the mean, median, mode and
midrange for the data.
1165
1270
590
1180
1005
860
1090
Exercises 6-1:
1.-
What are the characteristics of a normal distribution?
3.-
A normal distribution curve is bell-shaped
The mean, median, and mode are equal and are located at the center of the distribution.
A normal distribution curve is unimodal.
The c
Exercises 3-3
1.-
What is a z score? Is the value obtained by subtracting the mean from the value and dividing the
result by the standard deviation. The Z score represents the number of standard deviation that a
data falls below and above the mean.
9.-
Va
2nd Assignments
Section 2.1: For exercise, 5-8, find the class boundaries, midpoints, and widths for each class.
5.
43-47
o Class boundaries: 43-0.5= 42.95 ; 47+0.5=47.5 ; 42.5 47.5
o Midpoints: Xn= lower boundaries + upper boundaries / 2 = 42.5 + 47.5 /2
MAT 150
Elementary Statistics Special assignment for Sections 8.2 and 8.3
1) When people smoke, the nicotine they absorb is converted to cotinine, which can be
measured through blood tests. A random sample of 40 smokers has a mean cotinine
level of 172.5
Jillian Arena
Beh Stats
Research Proposal
April 22, 2012
Introduction.
Women in the workplace are no longer a rarity. Most women today work for at
least some part of lives even after marriage. This was not the case a mere fifty years ago.
Just because mor