Statistics
4th Edition
ISBN: 9780393929720
Author: David Freedman, Robert Pisani, Roger Purves
Publisher: Norton, W. W. & Company, Inc.
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Chapter 4.3, Problem 1EB
a.
To determine
Find the average for given Figure.
b.
To determine
Find the average for given Figure.
c.
To determine
Find the average for given Figure.
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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
Statistics
Ch. 4.2 - Prob. 1EACh. 4.2 - Prob. 2EACh. 4.2 - Prob. 3EACh. 4.2 - Prob. 4EACh. 4.2 - Prob. 5EACh. 4.2 - Prob. 6EACh. 4.2 - Prob. 7EACh. 4.2 - Prob. 8EACh. 4.2 - Prob. 9EACh. 4.3 - Prob. 1EB
Ch. 4.3 - Prob. 2EBCh. 4.3 - Prob. 3EBCh. 4.3 - Prob. 4EBCh. 4.3 - Prob. 5EBCh. 4.3 - Prob. 6EBCh. 4.4 - Prob. 1ECCh. 4.4 - Prob. 2ECCh. 4.4 - Prob. 3ECCh. 4.4 - Prob. 4ECCh. 4.4 - Prob. 5ECCh. 4.4 - Prob. 6ECCh. 4.5 - Prob. 1EDCh. 4.5 - Prob. 2EDCh. 4.5 - Prob. 3EDCh. 4.5 - Prob. 4EDCh. 4.5 - Prob. 5EDCh. 4.5 - Prob. 6EDCh. 4.5 - Prob. 7EDCh. 4.5 - Prob. 8EDCh. 4.5 - Prob. 9EDCh. 4.5 - Prob. 10EDCh. 4.6 - Prob. 1EECh. 4.6 - Prob. 2EECh. 4.6 - Prob. 3EECh. 4.6 - Prob. 4EECh. 4.6 - Prob. 5EECh. 4.6 - Prob. 6EECh. 4.6 - Prob. 7EECh. 4.6 - Prob. 8EECh. 4.6 - Prob. 9EECh. 4.6 - Prob. 10EECh. 4.6 - Prob. 11EECh. 4.6 - Prob. 12EECh. 4.8 - Prob. 1RECh. 4.8 - Prob. 2RECh. 4.8 - Prob. 3RECh. 4.8 - Prob. 4RECh. 4.8 - Prob. 5RECh. 4.8 - Prob. 6RECh. 4.8 - Prob. 7RECh. 4.8 - Prob. 8RECh. 4.8 - Prob. 9RECh. 4.8 - Prob. 10RECh. 4.8 - Prob. 11RECh. 4.8 - Prob. 12RE
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