MATH 120: Quiz 9 - 4/16/2014
In the 1980s it was generally believed that congenital abnormalities aected about
5% of the nations children. Some people believe that, in recent years, the increase in
the number of chemicals in the environment has led to an
Student Name:
Southwestern University
MAT 52-113: Introduction to Statistics
Spring 2007
Exam 1
February 21, 2007
Instructions:
* This is a standard closed-book, closed-notes test; collaboration or group work is not permitted.
* The time limit for taking
Student name:
Earlham College
MATH 120: Elementary Statistics Test 1
Spring 2014 February 12, 2014
Instructions:
0 This is a regular closedbook test, and is to be taken without the use of notes,
books, or other reference materials. Collaboration
MATH 120: Quiz 10 - 4/23/2014
Census results show that in 1960, the age at which American women rst married
had a mean of 22.8 years. A recent survey of a random sample of 30 women found
their average age at rst marriage to be 23.8 years, with standard de
MATH 120: Makeup Quiz - 4/30/2014
(a) A candidate running for a political oce conducts a survey and nds 54% support
in a random sample of 400 women, and 48% in a random sample of 460 men. Construct a 95% condence interval to determine whether there is evi
MATH 120: Quiz 7 - 4/04/2014
Based on past experience, a bank believes that 7% of the people who receive loans
will not make payments on time. The bank selects a random sample of 500 loan
customers from their database.
(a) Determine whether the conditions
MATH 120: Quiz 8 - 4/09/2014
Pew Research polled a random sample of 900 U.S. teens about their Internet use.
Sixty percent of those teens admitted they had misrepresented their age online to
access websites and online services.
(a) Create a 90% condence i
Quiz 3 - 9/20/2006
Quiz 3 - 9/20/2006
MATH 120: Quiz 3 - 2/05/2014
In the standard normal model, find each of the following:
In the standard normal model, find each of the following:
(a) The percentage of the distribution that lies in the region |z| > 1.2
MATH 120: Special Quiz: Extra Credit for Test1: 2/26/2014
Special instructions: No reference materials permitted.
(1) The 5-number summary of midterm scores for an Elementary Statistics class are
Min
17
Q1 Median Q3 Max
32
39
43
48
Would you expect the me
MATH 120: Quiz 6 - 3/12/2014
(I) A group of veterinarians wants to determine whether diet and exercise will help
chubby dogs get in shape. They propose two dierent diets (Diet A and Diet B) and
two dierent exercise programs (Plan 1 and Plan 2). Diet A: ow
MATH 120: Quiz 4 - 2/19/2014
A travel agency wants to study the association (if any!) between airline fares, and
distance traveled. They collect data on fare and distance for a random sample of
ights, and nd the scatterplot shows an approximately linear a
MATH 120: Quiz 2 - 1/29/2014
The quarterly EPS (earnings per share) in dollars for 16 corporations is given below:
-2.4, -2.1, -0.2, 1.9, 2.1, 2.9, 3.6, 3.8, 4.0, 4.1, 4.1, 4.2, 4.4, 4.7, 4.8, 5.0
(a) Make a suitably scaled, neat, accurate, boxplot for th
MATH 120: Quiz 5 - 3/05/2014
Assume the chance of having a baby girl is 48.5% and the chance of having a baby boy
is 51.5%. Suppose every every family decided to have exactly 2 children. Design a
statistical simulation with random numbers to estimate what
MATH 120: Quiz 1 - 1/22/2014
(I) Business analysts, hoping to provide information helpful to American grape growers, compiled these data about vineyards: size (acres), number of years in existence,
state, gross sales, and percent prot.
Identify the Who an