
Introduction to Business Statistics
7th Edition
ISBN: 9781111792374
Author: WEIERS
Publisher: Cengage Learning
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Chapter 4.7, Problem 4.39E
To determine
To explain the type of sampling has been used when the researcher selects all the invoice in the multiple of 13.
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A 95 percent confidence interval for the average miles per gallon for all cars of a certain type is 32.1, plus or minus 1.8. The interval is based on a sample of 40 randomly selected cars.
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3. (i) Below is the R code for performing a X2 test on a 2×3 matrix of categorical
variables called TestMatrix:
chisq.test(Test Matrix)
(a) Assuming we have a significant result for this procedure, provide the R
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(b) If we were to apply this technique to a 2 × 2 case, how would we adapt
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(ii) What procedure can we use if we want to test for association when we
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(iii) The following code contains the initial steps for a scenario where we are
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a car by using frequencies. There are two issues with the code - please state
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Row3<-c(75,15)
Row4<-c(50,-10)
MortgageMatrix<-matrix(c(Row1, Row4), byrow=T, nrow=2,
MortgageMatrix
dimnames=list(c("Yes", "No"), c("40 or older","<40")))…
Describe the situation in which Fisher’s exact test would be used?(ii) When do we use Yates’ continuity correction (with respect to contingencytables)?[2 Marks] 2. Investigate, checking the relevant assumptions, whether there is an associationbetween age group and home ownership based on the sample dataset for atown below:Home Owner: Yes NoUnder 40 39 12140 and over 181 59Calculate and evaluate the effect size.
Chapter 4 Solutions
Introduction to Business Statistics
Ch. 4.2 - What is the difference between primary data and...Ch. 4.2 - A published article reports that 60% of U.S....Ch. 4.2 - A pharmaceutical finn’s annual report states that...Ch. 4.2 - Prob. 4.4ECh. 4.3 - Prob. 4.5ECh. 4.3 - Prob. 4.6ECh. 4.3 - Prob. 4.7ECh. 4.3 - Prob. 4.8ECh. 4.3 - Prob. 4.9ECh. 4.3 - Prob. 4.10E
Ch. 4.3 - Prob. 4.11ECh. 4.3 - Prob. 4.12ECh. 4.3 - Prob. 4.13ECh. 4.4 - Prob. 4.14ECh. 4.4 - Prob. 4.15ECh. 4.4 - Prob. 4.16ECh. 4.4 - Prob. 4.17ECh. 4.4 - Prob. 4.18ECh. 4.5 - What are secondary data? Differentiate between...Ch. 4.5 - Prob. 4.20ECh. 4.5 - Prob. 4.21ECh. 4.5 - Prob. 4.22ECh. 4.5 - Prob. 4.23ECh. 4.5 - Prob. 4.24ECh. 4.6 - Prob. 4.32ECh. 4.6 - Differentiate between sampling error and...Ch. 4.6 - Prob. 4.34ECh. 4.6 - Prob. 4.35ECh. 4.6 - Prob. 4.36ECh. 4.6 - Prob. 4.37ECh. 4.7 - Attendees at an industrial trade show are given...Ch. 4.7 - Prob. 4.39ECh. 4.7 - Prob. 4.40ECh. 4.7 - Prob. 4.41ECh. 4.7 - Prob. 4.42ECh. 4.7 - For each of the following situations, would you...Ch. 4.7 - Prob. 4.44ECh. 4.7 - Prob. 4.45ECh. 4.7 - Prob. 4.46ECh. 4.7 - Prob. 4.47ECh. 4.7 - Prob. 4.48ECh. 4.7 - Prob. 4.49ECh. 4 - Prob. 4.50CECh. 4 - Prob. 4.51CECh. 4 - For each of the following report titles, indicate...Ch. 4 - Prob. 4.53CECh. 4 - Prob. 4.54CECh. 4 - A mail survey of junior executives is designed to...Ch. 4 - Prob. 4.56CECh. 4 - Prob. 4.57CECh. 4 - Prob. 4.58CECh. 4 - Prob. 4.59CECh. 4 - Prob. 4.60CECh. 4 - Prob. 4.61CECh. 4 - Prob. 4.62CECh. 4 - Prob. 4.64CECh. 4 - Prob. 4.67CECh. 4 - Prob. 4.68CECh. 4 - Prob. 4.69CECh. 4 - To test the effectiveness of a new type of plastic...Ch. 4 - Prob. 4.71CECh. 4 - A college of business has 20 faculty members in...Ch. 4 - Prob. 4.73CECh. 4 - Prob. 4.74CE
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