OPENINTRO:STATISTICS
4th Edition
ISBN: 9781943450077
Author: OPENINTRO
Publisher: amazon.com
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Chapter 2.1, Problem 5GP
To determine
Find n in the sample of loans.
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What is one sample T-test? Give an example of business application of this test?
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1. One Sample T-Test: Determine whether the average satisfaction rating of customers for a product is significantly different from a hypothetical mean of 75.
(Hints: The null can be about maintaining status-quo or no difference; If your alternative hypothesis is non-directional (e.g., μ≠75), you should use the two-tailed p-value from excel file to make a decision about rejecting or not rejecting null. If alternative is directional (e.g., μ < 75), you should use the lower-tailed p-value. For alternative hypothesis μ > 75, you should use the upper-tailed p-value.)
H0 =
H1=
Conclusion: The p value from one sample t-test is _______. Since the two-tailed p-value…
Using the accompanying Accounting Professionals data to answer the following questions.
a. Find and interpret a 90% confidence interval for the mean years of service.
b. Find and interpret a 90% confidence interval for the proportion of employees who have a graduate degree.
view the Accounting Professionals data.
Employee Years of Service Graduate Degree?1 26 Y2 8 N3 10 N4 6 N5 23 N6 5 N7 8 Y8 5 N9 26 N10 14 Y11 10 N12 8 Y13 7 Y14 27 N15 16 Y16 17 N17 21 N18 9 Y19 9 N20 9 N
Question content area bottom
Part 1
a. A 90% confidence interval for the mean years of service is
(Use ascending order. Round to two decimal places as needed.)
If, based on a sample size of 900,a political candidate finds that 509people would vote for him in a two-person race, what is the 95%confidence interval for his expected proportion of the vote? Would he be confident of winning based on this poll?
Question content area bottom
Part 1
A
9595%
confidence interval for his expected proportion of the vote is
(Use ascending order. Round to four decimal places as needed.)
Chapter 2 Solutions
OPENINTRO:STATISTICS
Ch. 2.1 - Prob. 2GPCh. 2.1 - Prob. 3GPCh. 2.1 - Prob. 4GPCh. 2.1 - Prob. 5GPCh. 2.1 - Prob. 9GPCh. 2.1 - Prob. 10GPCh. 2.1 - Prob. 12GPCh. 2.1 - Prob. 13GPCh. 2.1 - Prob. 15GPCh. 2.1 - Prob. 16GP
Ch. 2.1 - Prob. 17GPCh. 2.1 - Prob. 19GPCh. 2.1 - Prob. 22GPCh. 2.1 - Prob. 1ECh. 2.1 - Prob. 2ECh. 2.1 - Prob. 3ECh. 2.1 - Prob. 4ECh. 2.1 - Prob. 5ECh. 2.1 - Prob. 6ECh. 2.1 - Prob. 7ECh. 2.1 - Prob. 8ECh. 2.1 - Prob. 9ECh. 2.1 - Prob. 10ECh. 2.1 - Prob. 11ECh. 2.1 - Prob. 12ECh. 2.1 - Prob. 13ECh. 2.1 - Prob. 14ECh. 2.1 - Prob. 15ECh. 2.1 - Prob. 16ECh. 2.1 - Prob. 17ECh. 2.1 - Prob. 18ECh. 2.1 - Prob. 19ECh. 2.1 - Prob. 20ECh. 2.2 - Prob. 23GPCh. 2.2 - Prob. 24GPCh. 2.2 - Prob. 28GPCh. 2.2 - Prob. 29GPCh. 2.2 - Prob. 21ECh. 2.2 - Prob. 22ECh. 2.2 - Prob. 23ECh. 2.2 - Prob. 24ECh. 2.3 - Prob. 31GPCh. 2.3 - Prob. 32GPCh. 2.3 - Prob. 34GPCh. 2.3 - Prob. 25ECh. 2.3 - Prob. 26ECh. 2 - Prob. 27CECh. 2 - Prob. 28CECh. 2 - Prob. 29CECh. 2 - Prob. 30CECh. 2 - Prob. 31CECh. 2 - Prob. 32CECh. 2 - Prob. 33CECh. 2 - Prob. 34CE
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