The board of a major credit card company requires that the mean wait time for customers when they call customer service

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The board of a major credit card company requires that the mean
wait time for customers when they call customer service is at
most 4.50 minutes. To make sure that the mean wait time is not
exceeding the requirement, an assistant manager tracks the wait
times of 46 randomly selected calls. The mean wait time
was calculated to be 4.87 minutes. Assuming the population
standard deviation is 1.64 minutes, is there sufficient
evidence to say that the mean wait time for customers is longer
than 4.50 minutes with a 95% level of confidence?
Step 2 of 3 :
Compute the value of the test statistic. Round your answer to
two decimal places.
Step 3 of 3:
Draw a conclusion and interpret the decision.