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Answer :
Answer:
Step-by-step explanation:To find the correct 98% confidence interval, we need to:
1. Identify the sample size (n): Not explicitly given, but we have two options: n = 9 or n = 10.
2. Determine the degrees of freedom (df): df = n - 1.
3. Find the critical t-value for the 98% confidence interval using the t-table.
Assuming df = 9 - 1 = 8 (for n = 9) or df = 10 - 1 = 9 (for n = 10), we can look up the critical t-value:
For df = 8 and 98% confidence, the critical t-value is approximately 2.896.
For df = 9 and 98% confidence, the critical t-value is approximately 2.821.
Comparing the options:
A. 193±2.764(962.73): Incorrect critical t-value.
B. 193±2.764(1062.73): Incorrect critical t-value.
C. 193±2.821(962.73): Correct critical t-value for df = 9.
D. 193±2.821(1062.73): Correct critical t-value, but the sample size might be 9.
Given the options and the critical t-value, the most likely correct answer is:
C. 193±2.821(962.73)
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