Loose Leaf for Statistical Techniques in Business and Economics (Mcgraw-hill/Irwin Series in Operations and Decision Sciences)
16th Edition
ISBN: 9780077639709
Author: Douglas A. Lind, William G Marchal, Samuel A. Wathen
Publisher: McGraw-Hill Education
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Chapter 8, Problem 1SR
a.
To determine
Find the students that are included in the sample.
a.
Expert Solution
Answer to Problem 1SR
The students that are included in the sample are PRICE, MARY LYNETTE, DETLEY, BRIAN HANS, and MOLTER, KRISTI MARIE.
Explanation of Solution
From the given information, a list of 46 students is given and assigned the numbers as 00 to 45. The selected random numbers are 31, 7, and 25.
The students corresponding to the selected numbers are 31-PRICE, MARY LYNETTE, 7-DETLEY, BRIAN HANS, and 25-MOLTER, KRISTI MARIE.
Thus, the students that are included in the sample are PRICE, MARY LYNETTE, DETLEY, BRIAN HANS, and MOLTER, KRISTI MARIE.
b.
To determine
Select the own sample of students using table of random digits, Appendix B.4.
b.
Expert Solution
Answer to Problem 1SR
The own sample of students using table of random digits, Appendix B.4 is KABAT, JAMES DAVID, KILLION, MICHELLE A, and LEHMANN, KRISTINA MARIE.
Explanation of Solution
The first column and the sixth row are randomly selected in Appendix B.4. The number is 17147. From the given information, there are only 46 students. Select the first two digits of 17147. Thus, the first selected sample is 17. Continue the process by going in any direction until to get the sample of 3 students. Randomly go right from the number 17147. The first number that is right to the 17147 is 19 and the second number that is right to the 17147 is 22. Thus, the selected random numbers are 17, 19, and 22.
The students corresponding to the selected numbers are 17-KABAT, JAMES DAVID, 19-KILLION, MICHELLE A, and 22-LEHMANN, KRISTINA MARIE.
Thus, the own sample of students using table of random digits, Appendix B.4 is KABAT, JAMES DAVID, KILLION, MICHELLE A and LEHMANN, KRISTINA MARIE.
c.
To determine
Give the explanation that can be done if the number 59 is encountered in the table of random digits.
c.
Expert Solution
Explanation of Solution
The number 59 does not exist in the list because there are only 46 students. In that situation, select another random digit to select the sample.
Thus, if the number 59 is encountered in the table of random digits, then the number 59 would not be considered and another random digit would be selected to select the sample.
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Students have asked these similar questions
(a) Test the hypothesis.
Consider the hypothesis test Ho
=
:
against H₁o < 02. Suppose that the sample sizes aren₁ =
7 and n₂
= 13 and that
$²
= 22.4 and $22
= 28.2. Use α = 0.05.
Ho
is not
✓ rejected.
9-9
IV
(b) Find a 95% confidence interval on of 102. Round your answer to two decimal places (e.g. 98.76).
Let us suppose we have some article reported on a study of potential sources of injury to equine veterinarians conducted at a
university veterinary hospital. Forces on the hand were measured for several common activities that veterinarians engage in when
examining or treating horses. We will consider the forces on the hands for two tasks, lifting and using ultrasound. Assume that both
sample sizes are 6, the sample mean force for lifting was 6.2 pounds with standard deviation 1.5 pounds, and the sample mean force
for using ultrasound was 6.4 pounds with standard deviation 0.3 pounds. Assume that the standard deviations are known.
Suppose that you wanted to detect a true difference in mean force of 0.25 pounds on the hands for these two activities. Under the null
hypothesis, 40 = 0. What level of type II error would you recommend here?
Round your answer to four decimal places (e.g. 98.7654). Use a
= 0.05.
β
= i
What sample size would be required?
Assume the sample sizes are to be equal.…
=
Consider the hypothesis test Ho: μ₁ = μ₂ against H₁ μ₁ μ2. Suppose that sample sizes are n₁ =
15 and n₂ =
15, that x1 = 4.7
and X2 = 7.8 and that s² = 4 and s² = 6.26. Assume that o and that the data are drawn from normal distributions. Use
απ 0.05.
(a) Test the hypothesis and find the P-value.
(b) What is the power of the test in part (a) for a true difference in means of 3?
(c) Assuming equal sample sizes, what sample size should be used to obtain ẞ = 0.05 if the true difference in means is - 2? Assume
that α = 0.05.
(a) The null hypothesis is
98.7654).
rejected. The P-value is 0.0008
(b) The power is 0.94
. Round your answer to four decimal places (e.g.
Round your answer to two decimal places (e.g. 98.76).
(c) n₁ = n2 =
1
. Round your answer to the nearest integer.
Chapter 8 Solutions
Loose Leaf for Statistical Techniques in Business and Economics (Mcgraw-hill/Irwin Series in Operations and Decision Sciences)
Ch. 8 - Prob. 1SRCh. 8 - Prob. 2SRCh. 8 - The following is a list of 24 Marcos Pizza stores...Ch. 8 - The following is a list of 29 hospitals in the...Ch. 8 - Listed below are the 35 members of the Metro...Ch. 8 - Prob. 4ECh. 8 - The years of service of the five executives...Ch. 8 - Prob. 5ECh. 8 - Prob. 6ECh. 8 - Prob. 7E
Ch. 8 - Prob. 8ECh. 8 - Prob. 9ECh. 8 - There are five sales associates at Mid-Motors...Ch. 8 - Prob. 4SRCh. 8 - Prob. 11ECh. 8 - Prob. 12ECh. 8 - Prob. 5SRCh. 8 - Prob. 15ECh. 8 - Prob. 16ECh. 8 - Prob. 17ECh. 8 - Prob. 18ECh. 8 - Prob. 19CECh. 8 - The Medical Assurance Company is investigating the...Ch. 8 - Prob. 21CECh. 8 - Prob. 22CECh. 8 - Prob. 23CECh. 8 - Prob. 24CECh. 8 - Prob. 25CECh. 8 - As a part of their customer-service program,...Ch. 8 - Prob. 27CECh. 8 - Prob. 28CECh. 8 - Prob. 29CECh. 8 - The Appliance Center has six sales representatives...Ch. 8 - Prob. 31CECh. 8 - Prob. 32CECh. 8 - Prob. 33CECh. 8 - Prob. 34CECh. 8 - Prob. 35CECh. 8 - A recent study by the Greater Los Angeles Taxi...Ch. 8 - Prob. 37CECh. 8 - Prob. 38CECh. 8 - Prob. 39CECh. 8 - Prob. 40CECh. 8 - Prob. 41CECh. 8 - Human Resource Consulting (HRC) surveyed a random...Ch. 8 - Over the past decade, the mean number of hacking...Ch. 8 - Prob. 44CECh. 8 - Prob. 45CECh. 8 - Prob. 46DECh. 8 - Prob. 47DECh. 8 - Prob. 48DE
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