An agriculture publication claims that the population mean of the birth weights for all Herdwick sheep is 4.62 kg. A veterinary service has hired you to test that claim. To do so, you select a random sample of 35 Herdwick sheep and record the birth weights. Assume it is known that the population standard deviation of the birth weights of Herdwick sheep is 2.15 kg. Based on your sample, follow the steps below to construct a 95% confidence interval for the population mean of the birth weights for all Herdwick sheep. Then state whether the confidence interval you construct contradicts the publication's claim. (If necessary, consult a list of formulas.)

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## Testing a Population Mean Claim for Herdwick Sheep Birth Weights

An agriculture publication claims that the population mean of the birth weights for all Herdwick sheep is 4.62 kg. A veterinary service has been hired to test this claim. You select a random sample of 35 Herdwick sheep and record their birth weights. Assume it is known that the population standard deviation of the birth weights of Herdwick sheep is 2.15 kg.

### Steps to Construct a 95% Confidence Interval

Based on your sample, follow the steps below to construct a 95% confidence interval for the population mean of the birth weights for all Herdwick sheep. Then state whether the confidence interval you construct contradicts the publication's claim.

1. **Sampling Data**:
   - **Number of sheep**: 35
   - **Sample mean**: 3.49 kg
   - **Sample standard deviation**: 2.09 kg
   - **Population standard deviation**: 2.15 kg

2. **Confidence Interval Construction Steps**:
   - Enter the values in the provided fields for sample size, point estimate, and standard deviations.
   - Use the critical value from the table provided for 95% confidence: 
     - \( z_{0.025} = 1.960 \)

#### Diagram Explanation
- The diagram contains fields to calculate the 95% confidence interval.
- It includes a table for Critical Values.
- After filling out the relevant values and computing, you obtain the margin of error and the confidence interval.

3. **Graph**:
   - Plot the lower and upper limits of the confidence interval on the graph.
   - Mark the point for the publication's claim of 4.62 kg.

### Evaluation of Claim

4. **Check the Claim**:
   - Does the 95% confidence interval contradict the publication's claim?
   - Options provided:
     - No, the confidence interval does not contradict the claim. The publication's claim is inside the 95% confidence interval.
     - No, the confidence interval does not contradict the claim. The publication's claim is outside the 95% confidence interval.
     - Yes, the confidence interval contradicts the claim. The publication's claim is inside the 95% confidence interval.
     - Yes, the confidence interval contradicts the claim. The publication's claim is outside the 95% confidence interval.

Select the most appropriate answer based on your calculations and
Transcribed Image Text:## Testing a Population Mean Claim for Herdwick Sheep Birth Weights An agriculture publication claims that the population mean of the birth weights for all Herdwick sheep is 4.62 kg. A veterinary service has been hired to test this claim. You select a random sample of 35 Herdwick sheep and record their birth weights. Assume it is known that the population standard deviation of the birth weights of Herdwick sheep is 2.15 kg. ### Steps to Construct a 95% Confidence Interval Based on your sample, follow the steps below to construct a 95% confidence interval for the population mean of the birth weights for all Herdwick sheep. Then state whether the confidence interval you construct contradicts the publication's claim. 1. **Sampling Data**: - **Number of sheep**: 35 - **Sample mean**: 3.49 kg - **Sample standard deviation**: 2.09 kg - **Population standard deviation**: 2.15 kg 2. **Confidence Interval Construction Steps**: - Enter the values in the provided fields for sample size, point estimate, and standard deviations. - Use the critical value from the table provided for 95% confidence: - \( z_{0.025} = 1.960 \) #### Diagram Explanation - The diagram contains fields to calculate the 95% confidence interval. - It includes a table for Critical Values. - After filling out the relevant values and computing, you obtain the margin of error and the confidence interval. 3. **Graph**: - Plot the lower and upper limits of the confidence interval on the graph. - Mark the point for the publication's claim of 4.62 kg. ### Evaluation of Claim 4. **Check the Claim**: - Does the 95% confidence interval contradict the publication's claim? - Options provided: - No, the confidence interval does not contradict the claim. The publication's claim is inside the 95% confidence interval. - No, the confidence interval does not contradict the claim. The publication's claim is outside the 95% confidence interval. - Yes, the confidence interval contradicts the claim. The publication's claim is inside the 95% confidence interval. - Yes, the confidence interval contradicts the claim. The publication's claim is outside the 95% confidence interval. Select the most appropriate answer based on your calculations and
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