1 out of 1.00001 points
PER CAPITA INCOME OF U.S. SHRINKS RELATIVE TO OTHER COUNTRIES
(from UTTS, 2005, pages 23-24; if you have the loose-leaf version from publisher that
contains both the HOWELL and UTTS texts, the latter comes after the former if you
0.66667 out of 1 points
The goal(s) of statistical procedures is(are) to _
Select any and all options that are correct.
reduce large masses of data into
manageable proportions
predict or infer what might happen in the
future
Answe frustrate nursing stude
ALEKS
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Standard normal probabilities
Let be a standard normal random variable. Calculate the following probabilities using the
calculator provided. Round your responses to at least three decimal places.
Answer:
Practice
https:/www-awd.aleks.com
ALEKS Jonathan J. Kirkendall - 02/23/2017 9:10:07 PM CST - Copyright 2017 UC Re. Page 1 of 2
Jonathan J. Kirkendall - 02/23/2017 9:10:07 PM CST
College Introduction to Statistics / MA 320 Statistics - Spring Term A 2017 – 7
(Labine)
1.
Binomial prob
ALEKS
Page 1 of 1
Expectation and variance of a random variable
Let
be a random variable with the following probability distribution:
Value
Find the expectation
and variance
of
10
0.75
20
0.10
30
0.05
40
0.10
of
.
(If necessary, consult a list of formulas
ALEKS
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Standard normal values: Basic
Let
be a standard normal random variable. Use the calculator provided to determine the
value of
such that
.
Round your answer to at least two decimal places.
Answer:
Done
More Practice
https:/www-awd.aleks.c
ALEKS
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Selecting a distribution for inferences on the population mean
Suppose that we want to estimate the mean daily profit of a convenience store. For this purpose, we
sample of days. The sample has a mean of
dollars and a standard deviation
ALEKS
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Probability of dependent events
A pizza restaurant offers
different toppings: of them are vegetarian and of them are
non-vegetarian. A customer selects her first topping at random and then selects another one at
random from the remaining
ALEKS Jonathan J. Kirkendall - 02/23/2017 10:19:42 PM CST - Copyright 2017 UC R. Page 1 of 3
Jonathan J. Kirkendall - 02/23/2017 10:19:42 PM CST
College Introduction to Statistics / MA 320 Statistics - Spring Term A 2017 – 7
(Labine)
1.
Selecting a
ALEKS Jonathan J. Kirkendall - 02/23/2017 8:56:48 PM CST - Copyright 2017 UC Re. Page 1 of 2
Jonathan J. Kirkendall - 02/23/2017 8:56:48 PM CST
College Introduction to Statistics / MA 320 Statistics - Spring Term A 2017 – 7
(Labine)
1.
Binomial prob
ALEKS
Page 1 of 3
Normal versus standard normal density curves
Below is a graph of a normal distribution with mean
and standard deviation
probability of obtaining a value from this distribution that is between
and
.
X
1
5
9
Shade the corresponding region
ALEKS
Page 1 of 1
Conditional probability: Basic
At a certain college,
% of the students are female, and
engineering. Furthermore,
% of the students major in civil
% of the students both are female and major in civil engineering.
(a) What is the probabili
ALEKS
Page 1 of 2
Central limit theorem: Sample mean
Alcohol withdrawal occurs when a person who uses alcohol excessively suddenly stops the alcohol
onset of withdrawal is experienced a mean of 40 hours after the last drink, with a standard deviation
who
ALEKS
Page 1 of 1
Discrete probability distribution: Word problems
Suppose that the genders of the three children of a certain family are soon to be revealed.
Outcomes are thus triples of "girls" ( ) and "boys" ( ), which we write
,
, etc. For
each outcom
If you want to choose a different question,
click on "MyPie".
Mutually exclusive events: Two events
Events
and
are mutually exclusive.
Suppose event
occurs with probability
and event
occurs with probability
.
a. Compute the probability that
occurs or does
Print
Co
ndi
tio
nal
pro
ba
bili
ty:
Ba
sic
Of
the
driv
ers
wh
o
sto
pat
a
gas
stat
ion,
%
pur
cha
se
gas
olin
e,
and
%
pur
cha
se
bot
h
gasolineandoil.Atotalof %purchaseoil.
(a)Whatistheprobabilitythatadriverpurchasesgasoline,giventhatheorshe
purchasesoi
ALEKS
Page 1 of 1
Standard normal values: Basic
Let
be a standard normal random variable. Use the calculator provided to determine the
value of
such that
.
Carry your intermediate computations to at least four decimal places. Round your answer to at least
ALEKS
Page 1 of 2
Binomial problems: Basic
A TV executive is interested in the popularity of a particular cable TV show. She has been told
that a whopping
of American households would be interested in tuning in to a new
network version of the show. If thi
ALEKS
Page 1 of 3
Normal versus standard normal density curves
Below is a graph of a normal distribution with mean
and standard deviation
probability of obtaining a value from this distribution that is less than
.
y
0.4
0.3
0.2
0.1
X
4
2
Shade the corresp
ALEKS
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Mean, median, and mode: Comparisons
The following list contains the average annual total returns (in percentage points) for
online brokerage firm's "all-star" list.
mutual fun
-5, -4, -1, 2, 2, 5, 9, 9, 12, 12, 13, 14, 15, 18, 19, 21, 22
ALEKS
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Intersection and conditional probability
Suppose that a certain college class contains
psychology majors, and
students. Of these,
are seniors,
are neither. A student is selected at random from the class.
(a) What is the probability that
ALEKS
Page 1 of 3
Standard normal values: Basic
Let
be a standard normal random variable. Use the calculator provided to determine the
value of
such that
.
Carry your intermediate computations to at least four decimal places. Round your answer to at least
Print
Co
ndi
tio
nal
pro
ba
bili
ty:
Ba
sic
Of
the
driv
ers
wh
o
sto
pat
a
gas
stat
ion,
%
pur
cha
se
gas
olin
e,
and
%
pur
cha
se
bot
h
gasolineandoil.Atotalof %purchaseoil.
(a)Whatistheprobabilitythatadriverpurchasesgasoline,giventhatheorshe
purchasesoi
ALEKS
Page 1 of 3
Normal versus standard normal density curves
Below is a graph of a normal distribution with mean
and standard deviation
probability of obtaining a value from this distribution that is between
and
.
y
0.4
0.3
0.2
0.1
X
4
0
2
Shade the cor
Arithmetic REVIEW
Addition and Subtraction
Everyone knows how to add, at least if all of the numbers are positive, but I have to start
somewhere. Most of the time we deal with positive numbers, because we want to talk about
things like the cost of a hambu
1110 Exam 1 review sheet #4
Given, an IQ test with:
weekley/f2013
100
16
What percent of IQ scores will fall above a z-score of -1.6?
What proportion of scores falls between an IQ of 90 and an IQ of 103?
What IQ falls at the 28th percentile?
1110 Exam 1
1110 e-stats Exam 1 review #2: Probability
sweekley/f2013
1. Given that there were 500 individuals studied:
working
sick
healthy
170
80
vacationing
85
165
Find the probability that:
p(V)
a. person was vacationing
p(S/W)
b. person was sick, given that the
1110 e-stats Exam 1 review EXTRA
sweekley/ spring2013
1. Given that there were 200 individuals studied:
working
sick
healthy
40
35
75
vacationing
45
85
80
115
125
Find the probability that:
p(W)
a. person was working.
p(H/W)
b. person was healthy, given t
1110
Correlation/ Regression
Final Exam Review
sweekley
X = # of desserts eaten
Y = # of pounds lost in a month.
*Calculate Pearson r with the following data, and then calculate the regression equation,
the standard error. Then, please answer the question