The Basic Practice of Statistics
7th Edition
ISBN: 9781464142536
Author: David S. Moore, William I. Notz, Michael A. Fligner
Publisher: W. H. Freeman
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Question
Chapter 1.5, Problem 1.10AYK
a.
To determine
To draw: A stem plot for the given dataset.
To identify: The midpoint and variability.
b.
To determine
To draw: The stem-and-Leaf plot by splitting the stems in the order: 1st stem contains 0 to 4 leaves 2nd stem has 5 to 9 leaves.
To compare: The results from a histogram.
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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 1 Solutions
The Basic Practice of Statistics
Ch. 1.1 - Prob. 1.1AYKCh. 1.1 - Prob. 1.2AYKCh. 1.2 - Prob. 1.3AYKCh. 1.2 - Prob. 1.4AYKCh. 1.2 - Prob. 1.5AYKCh. 1.3 - Prob. 1.6AYKCh. 1.3 - Prob. 1.7AYKCh. 1.4 - Prob. 1.8AYKCh. 1.4 - Prob. 1.9AYKCh. 1.5 - Prob. 1.10AYK
Ch. 1.5 - Prob. 1.11AYKCh. 1.6 - Prob. 1.12AYKCh. 1 - Prob. 1.13CYSCh. 1 - Prob. 1.14CYSCh. 1 - Prob. 1.15CYSCh. 1 - Prob. 1.16CYSCh. 1 - Prob. 1.17CYSCh. 1 - Prob. 1.18CYSCh. 1 - Prob. 1.19CYSCh. 1 - Prob. 1.20CYSCh. 1 - Prob. 1.21CYSCh. 1 - Prob. 1.22CYSCh. 1 - Prob. 1.23ECh. 1 - Prob. 1.24ECh. 1 - Prob. 1.25ECh. 1 - Prob. 1.26ECh. 1 - Prob. 1.27ECh. 1 - Prob. 1.28ECh. 1 - Prob. 1.29ECh. 1 - Prob. 1.30ECh. 1 - Prob. 1.31ECh. 1 - Prob. 1.32ECh. 1 - Prob. 1.33ECh. 1 - Prob. 1.34ECh. 1 - Prob. 1.35ECh. 1 - Prob. 1.36ECh. 1 - Prob. 1.37ECh. 1 - Prob. 1.38ECh. 1 - Prob. 1.39ECh. 1 - Prob. 1.40ECh. 1 - Prob. 1.41ECh. 1 - Prob. 1.42ECh. 1 - Prob. 1.43ECh. 1 - Prob. 1.44ECh. 1 - Prob. 1.45ECh. 1 - Prob. 1.46E
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