Elementary Statistics: Picturing the World (7th Edition)
7th Edition
ISBN: 9780134683416
Author: Ron Larson, Betsy Farber
Publisher: PEARSON
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Textbook Question
Chapter 8, Problem 8.1.6RE
In Exercises 5–8, test the claim about the difference between two population means μ1 and μ2, at the level of significance α. Assume the samples are random and independent, and the populations are
6. Claim: μ1 = μ2; α = 0.01
Population statistics: σ1 = 52 and σ2 = 68
Sample statistics:
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In Exercises 11 –14, test the claim about the difference between two population means u1 and u2 at the level of significance a. Assume the samples are random and independent, and the populations are normally distributed.
Assume a data set D is observed by three models M₁, M2, and M3
which all follow a normal distribution with the variance 4. The
differences between the models are in their means of the distri-
bution which are 2, 4, and 8; respectively. Furthermore, assume
that from prior knowledge we believe p(M₁) = 0.3, p(M₂) = 0.4
and p(M3) = 0.3. Given a data point x = 3.1 which model has a
higher accuracy (or probability to be correct)?
Test the claim about the population mean, u, at the given level of significance using the given sample statistics.
Claim: #6000; α=0.07; = 389. Sample statistics: x=6200, n=35
μ
Identify the null and alternative hypotheses. Choose the correct answer below.
Ο A. Ho: μ = 6000
Ha: µ#6000
OC. Ho µ‡ 6000
H₂ μ=6000
QE. Ho: 26000
H₂: μ#6000
OB. Ho u≤6000
Ha μ#6000
O D. Ho: μ#6000
Hai μ ≥6000
OF. Ho μ#6000
H₂ μ≤6000
11
Chapter 8 Solutions
Elementary Statistics: Picturing the World (7th Edition)
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