Q20Comprehension3 Marks1 Sep 2024
Passage
An old charging method takes an average of 60 minutes to fully charge a battery with a standard deviation of 10 minutes. A new charging method is introduced and is expected to reduce this time to around 55 minutes. We want to test if the new charging method significantly reduces the average charging time. To evaluate this, the new charging method is tested on 36 batteries and the average charging time is found to be 57 minutes. Based on the above data, answer the given subquestions.
Find the critical value c at a significance level of 0.05. Enter the answer correct to two decimal places.
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