Introduction to Business Statistics
7th Edition
ISBN: 9781111792374
Author: WEIERS
Publisher: Cengage Learning
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Chapter 4.7, Problem 4.44E
To determine
To select simple random sample of 5 from the 50 states of the United States.
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Consider the time series X₁ and Y₁ = (I – B)² (I – B³)Xt. What transformations were
performed on Xt to obtain Yt?
seasonal difference of order 2
simple difference of order 5
seasonal difference of order 1
seasonal difference of order 5
simple difference of order 2
Calculate the 90% confidence interval for the population mean difference using the data in the attached image. I need to see where I went wrong.
Microsoft Excel snapshot for random sampling: Also note the formula used for the last
column
02
x✓ fx =INDEX(5852:58551, RANK(C2, $C$2:$C$51))
A
B
1
No.
States
2
1
ALABAMA
Rand No.
0.925957526
3
2
ALASKA
0.372999976
4
3
ARIZONA
0.941323044
5
4 ARKANSAS
0.071266381
Random Sample
CALIFORNIA
NORTH CAROLINA
ARKANSAS
WASHINGTON
G7
Microsoft Excel snapshot for systematic sampling:
xfx INDEX(SD52:50551, F7)
A
B
E
F
G
1
No.
States
Rand No. Random Sample
population
50
2
1 ALABAMA
0.5296685 NEW HAMPSHIRE
sample
10
3
2 ALASKA
0.4493186 OKLAHOMA
k
5
4
3 ARIZONA
0.707914 KANSAS
5
4 ARKANSAS 0.4831379 NORTH DAKOTA
6
5 CALIFORNIA 0.7277162 INDIANA
Random Sample
Sample Name
7
6 COLORADO 0.5865002 MISSISSIPPI
8
7:ONNECTICU 0.7640596 ILLINOIS
9
8 DELAWARE 0.5783029 MISSOURI
525
10
15
INDIANA
MARYLAND
COLORADO
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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- Client 1 Weight before diet (pounds) Weight after diet (pounds) 128 120 2 131 123 3 140 141 4 178 170 5 121 118 6 136 136 7 118 121 8 136 127arrow_forwardClient 1 Weight before diet (pounds) Weight after diet (pounds) 128 120 2 131 123 3 140 141 4 178 170 5 121 118 6 136 136 7 118 121 8 136 127 a) Determine the mean change in patient weight from before to after the diet (after – before). What is the 95% confidence interval of this mean difference?arrow_forwardIn order to find probability, you can use this formula in Microsoft Excel: The best way to understand and solve these problems is by first drawing a bell curve and marking key points such as x, the mean, and the areas of interest. Once marked on the bell curve, figure out what calculations are needed to find the area of interest. =NORM.DIST(x, Mean, Standard Dev., TRUE). When the question mentions “greater than” you may have to subtract your answer from 1. When the question mentions “between (two values)”, you need to do separate calculation for both values and then subtract their results to get the answer. 1. Compute the probability of a value between 44.0 and 55.0. (The question requires finding probability value between 44 and 55. Solve it in 3 steps. In the first step, use the above formula and x = 44, calculate probability value. In the second step repeat the first step with the only difference that x=55. In the third step, subtract the answer of the first part from the…arrow_forward
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