question archive The waiting time for customers at MacBurger Restaurants follows a normal distribution with a population standard deviation of 1 minute
The waiting time for customers at MacBurger Restaurants follows a normal distribution with a population standard deviation of 1 minute
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The waiting time for customers at MacBurger Restaurants follows a normal distribution with a population standard deviation of 1 minute. At the Warren Road MacBurger, the quality-assurance department sampled 50 customers and found that the mean waiting time was 2.75 minutes. At the 0.05 significance level, can we conclude that the mean waiting time is less than 3 minutes
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