Textbook ExpertVerified Tutor
12 Nov 2021
Given information
The sample size is now unknown. The sample mean and sample standard deviation is 23.6 and 7 hours respectively. The population is normally distributed.
The error bound is 1 hour and the confidence level is 96%.
Step-by-step explanation
Step 1.
The formula for the error bound is:
For a 96% confidence level, the critical value is 2.05. The error bound according to the problem is E=1 hour.
Square both sides of the equation:
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