Practice of Statistics in the Life Sciences
4th Edition
ISBN: 9781319013370
Author: Brigitte Baldi, David S. Moore
Publisher: W. H. Freeman
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Chapter 4, Problem 4.42E
To determine
To understand; whether an association must be deterministic without any variability to conclude causality and find out the missinglurking variable which may influence a smoker’s chance of death from a smoking related issue.
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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
Suppose the Internal Revenue Service reported that the mean tax refund for the year 2022 was $3401. Assume the standard deviation is $82.5 and that the amounts refunded follow a normal probability distribution. Solve the following three parts? (For the answer to question 14, 15, and 16, start with making a bell curve. Identify on the bell curve where is mean, X, and area(s) to be determined.
1.What percent of the refunds are more than $3,500?
2. What percent of the refunds are more than $3500 but less than $3579?
3. What percent of the refunds are more than $3325 but less than $3579?
Chapter 4 Solutions
Practice of Statistics in the Life Sciences
Ch. 4 - Prob. 4.1AYKCh. 4 - Prob. 4.2AYKCh. 4 - Prob. 4.3AYKCh. 4 - Prob. 4.4AYKCh. 4 - Prob. 4.5AYKCh. 4 - Prob. 4.6AYKCh. 4 - Prob. 4.7AYKCh. 4 - Prob. 4.8AYKCh. 4 - Prob. 4.9AYKCh. 4 - Prob. 4.10AYK
Ch. 4 - Prob. 4.11AYKCh. 4 - Prob. 4.12AYKCh. 4 - Prob. 4.13AYKCh. 4 - Prob. 4.15CYSCh. 4 - Prob. 4.16CYSCh. 4 - Prob. 4.17CYSCh. 4 - Prob. 4.18CYSCh. 4 - Prob. 4.19CYSCh. 4 - Prob. 4.20CYSCh. 4 - Prob. 4.21CYSCh. 4 - Prob. 4.22CYSCh. 4 - Prob. 4.23CYSCh. 4 - Prob. 4.24CYSCh. 4 - Prob. 4.25ECh. 4 - Prob. 4.26ECh. 4 - Prob. 4.28ECh. 4 - Prob. 4.29ECh. 4 - Prob. 4.30ECh. 4 - Prob. 4.31ECh. 4 - Prob. 4.32ECh. 4 - Prob. 4.33ECh. 4 - Prob. 4.34ECh. 4 - Prob. 4.35ECh. 4 - Prob. 4.36ECh. 4 - Prob. 4.37ECh. 4 - Prob. 4.38ECh. 4 - Prob. 4.39ECh. 4 - Prob. 4.40ECh. 4 - Prob. 4.41ECh. 4 - Prob. 4.42E
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