Thank you for visiting The reserve capacities in hours of 18 randomly selected automotive batteries are listed below Use a 99 level of confidence to analyze the data 1. This page is designed to guide you through key points and clear explanations related to the topic at hand. We aim to make your learning experience smooth, insightful, and informative. Dive in and discover the answers you're looking for!
Answer :
Answer:
99% confidence interval is (1.75, 5.61)
Step-by-step explanation:
From the data above, mean is 3.68 and sd is 2.06. n = 18, degree of freedom = n-1 = 18-1 = 17. t-value corresponding to 17 degrees of freedom and 99% confidence level is 3.965
Confidence Interval (CI) = mean + or - (t×sd)/√n
CI = 3.68 + (3.965×2.06)/√18 = 3.68 + 8.1679/4.243 = 3.68 + 1.93 = 5.61
CI = 3.68 - (3.965×2.06)/√18 = 3.68 - 8.1678/4.243 = 3.68 - 1.93 = 1.75
99% confidence interval is (1.75, 5.61)
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