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Grace is the manager at a local restaurant and has implemented changes to her operation to reduce
the average wait time for a table between 6pm and 8pm on Saturday night to less than 20 minutes.
A random sample of 45 wait times on Saturday night had a
past experience that the standard deviation of wait times is 5 minutes. Conduct a hypothesis test
using p-value and critical value approach to determine if Grace’s changes have reduced average wait
time to less than 20 minutes using α = 0.01
Grace is the manager at a local restaurant and has implemented changes to her operation to reduce
the average wait time for a table between 6pm and 8pm on Saturday night to less than 20 minutes.
A random sample of 45 wait times on Saturday night had a
past experience that the standard deviation of wait times is 5 minutes. Conduct a hypothesis test
using p-value and critical value approach to determine if Grace’s changes have reduced average wait
time to less than 20 minutes using α = 0.01
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