A hypothesis test Is to be performed. Determine the null and alternate hypotheses. In 1994, the average duration of long-distance telephone calls originating in one town was 7.1 minutes. A long-distance telephone company wants to perform a hypothesis test to determine whether the average duration of long-distance phone calls has changed from the 1994 mean of 7.1 minutes.
A hypothesis test Is to be performed. Determine the null and alternate hypotheses. In 1994, the average duration of long-distance telephone calls originating in one town was 7.1 minutes. A long-distance telephone company wants to perform a hypothesis test to determine whether the average duration of long-distance phone calls has changed from the 1994 mean of 7.1 minutes.
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.6: Summarizing Categorical Data
Problem 30PPS
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![### Hypothesis Testing: Null and Alternative Hypotheses
**Scenario:**
In 1994, the average duration of long-distance telephone calls originating in one town was 7.1 minutes. A long-distance telephone company wants to conduct a hypothesis test to determine whether the average duration of long-distance phone calls has changed from the 1994 mean of 7.1 minutes.
**Objective:**
Determine the null and alternate hypotheses for this scenario.
**Possible Choices:**
1. \( H_0: \mu = 7.1 \) minutes, \( H_1: \mu > 7.1 \) minutes
2. \( H_0: \mu = 7.1 \) minutes, \( H_1: \mu < 7.1 \) minutes
3. \( H_0: \mu \neq 7.1 \) minutes, \( H_1: \mu = 7.1 \) minutes
4. \( H_0: \mu = 7.1 \) minutes, \( H_1: \mu \neq 7.1 \) minutes
5. \( H_0: \mu = 7.1 \) minutes, \( H_1: \mu < 7.1 \) minutes
**Graphical Representation:**
The given image presents a multiple-choice format where different hypothesis pairs are listed, with each pair consisting of a null hypothesis (\(H_0\)) and an alternate hypothesis (\(H_1\)).
**Explanation of Setup:**
- **Null Hypothesis (\(H_0\))**: Represents the status quo or the hypothesis that indicates no effect or no change. Here, it suggests that the average duration of the phone calls is still 7.1 minutes.
- **Alternate Hypothesis (\(H_1\))**: Represents a change or an effect. This could either indicate that the average duration has increased, decreased, or simply changed in either direction.
**Choose the Correct Pair:**
For a two-tailed hypothesis test, where we are interested in any change from the historical mean (both increases and decreases),
we use:
- \( H_0: \mu = 7.1 \) minutes
- \( H_1: \mu \neq 7.1 \) minutes
Hence, the fourth option listed in the multiple-choice setup should be selected.
**Instructions:](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F02edcb37-a5b4-4ad7-814d-fe9fafc40457%2Faff20a34-60a7-4d70-b513-e0ba0e6f6d29%2Fvm8px9r_processed.jpeg&w=3840&q=75)
Transcribed Image Text:### Hypothesis Testing: Null and Alternative Hypotheses
**Scenario:**
In 1994, the average duration of long-distance telephone calls originating in one town was 7.1 minutes. A long-distance telephone company wants to conduct a hypothesis test to determine whether the average duration of long-distance phone calls has changed from the 1994 mean of 7.1 minutes.
**Objective:**
Determine the null and alternate hypotheses for this scenario.
**Possible Choices:**
1. \( H_0: \mu = 7.1 \) minutes, \( H_1: \mu > 7.1 \) minutes
2. \( H_0: \mu = 7.1 \) minutes, \( H_1: \mu < 7.1 \) minutes
3. \( H_0: \mu \neq 7.1 \) minutes, \( H_1: \mu = 7.1 \) minutes
4. \( H_0: \mu = 7.1 \) minutes, \( H_1: \mu \neq 7.1 \) minutes
5. \( H_0: \mu = 7.1 \) minutes, \( H_1: \mu < 7.1 \) minutes
**Graphical Representation:**
The given image presents a multiple-choice format where different hypothesis pairs are listed, with each pair consisting of a null hypothesis (\(H_0\)) and an alternate hypothesis (\(H_1\)).
**Explanation of Setup:**
- **Null Hypothesis (\(H_0\))**: Represents the status quo or the hypothesis that indicates no effect or no change. Here, it suggests that the average duration of the phone calls is still 7.1 minutes.
- **Alternate Hypothesis (\(H_1\))**: Represents a change or an effect. This could either indicate that the average duration has increased, decreased, or simply changed in either direction.
**Choose the Correct Pair:**
For a two-tailed hypothesis test, where we are interested in any change from the historical mean (both increases and decreases),
we use:
- \( H_0: \mu = 7.1 \) minutes
- \( H_1: \mu \neq 7.1 \) minutes
Hence, the fourth option listed in the multiple-choice setup should be selected.
**Instructions:
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