BASIC PRACTICE OF STATISTICS(REISSUE)>C
8th Edition
ISBN: 9781319341831
Author: Moore
Publisher: MAC HIGHER
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Question
Chapter 23, Problem 23.9CYS
To determine
To find: The hypotheses that has to be tested.
Expert Solution & Answer
Answer to Problem 23.9CYS
Correct answer:
The hypotheses to be tested are
Explanation of Solution
Reason for the correct answer:
In the given situation, there is evidence that the proportion of 12th graders who eat breakfast daily is lower than the proportion of 9th-graders eating breakfast daily is tested.
Hence, option (b) is correct.
Reason for the incorrect answer:
Option (a) and Option (c) are incorrect, because the proportion of 12th graders who eat breakfast daily is lower than the proportion of 9th-graders eating breakfast daily is tested.
Conclusion:
The test hypotheses for the proportion of 12th graders who eat breakfast daily is lower than the proportion of 9th-graders eating breakfast daily is
Statistics Concept Introduction
Introduction:
Null hypothesis:
A statement about population parameter which is equal to the value mentioned in claim value, which is denoted by
Alternative hypothesis:
It is opposite to the null hypothesis. That is, it differs from the null hypothesis. The possible symbols used in the alternative hypothesis would be <, >, or ≠. It is denoted by
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column
02
x✓ fx =INDEX(5852:58551, RANK(C2, $C$2:$C$51))
A
B
1
No.
States
2
1
ALABAMA
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0.925957526
3
2
ALASKA
0.372999976
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0.941323044
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4 ARKANSAS
0.071266381
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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
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6
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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?
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3. What percent of the refunds are more than $3325 but less than $3579?
A normal distribution has a mean of 50 and a standard deviation of 4. Solve the following three parts?
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 answer of the second part.)
2. Compute the probability of a value greater than 55.0.
Use the same formula, x=55 and subtract the answer from 1.
3. Compute the probability of a value between 52.0 and 55.0.
(The question requires finding probability value between 52 and 55. Solve it in 3 steps.
In the first step, use the above formula and x = 52, 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…
Chapter 23 Solutions
BASIC PRACTICE OF STATISTICS(REISSUE)>C
Ch. 23.4 - Prob. 1AYKCh. 23.4 - Prob. 2AYKCh. 23.4 - Prob. 3AYKCh. 23.5 - Prob. 4AYKCh. 23.5 - Prob. 5AYKCh. 23.5 - Prob. 6AYKCh. 23.6 - Prob. 7AYKCh. 23.6 - Prob. 8AYKCh. 23 - Prob. 23.9CYSCh. 23 - Prob. 23.10CYS
Ch. 23 - Prob. 23.11CYSCh. 23 - Prob. 23.12CYSCh. 23 - Prob. 23.13CYSCh. 23 - Prob. 23.14CYSCh. 23 - Prob. 23.15CYSCh. 23 - Prob. 23.16CYSCh. 23 - Prob. 23.17ECh. 23 - Prob. 23.18ECh. 23 - Prob. 23.19ECh. 23 - Prob. 23.20ECh. 23 - Prob. 23.21ECh. 23 - Prob. 23.22ECh. 23 - Prob. 23.23ECh. 23 - Prob. 23.24ECh. 23 - Prob. 23.25ECh. 23 - Prob. 23.26ECh. 23 - Prob. 23.27ECh. 23 - Prob. 23.28ECh. 23 - Prob. 23.29ECh. 23 - Prob. 23.31ECh. 23 - Prob. 23.32ECh. 23 - Prob. 23.33ECh. 23 - Prob. 23.34ECh. 23 - Prob. 23.35ECh. 23 - Prob. 23.36E
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