Make up your own problem(LIKE PROBLEM 1,DO NOT ANSWER PROBLEM 1 PLEASE) where 1-sample z-test is appropriate with , and solve it using both the approaches below:

1. Critical Value Approach using z-table
2. P-value Approach using z-table

EXAMPLE :

Problem 1 A hospital's administration measured the waiting times of a sample of 40 patients, and calculated their mean as 4.5 minutes, with a standard deviation of 1.2 minutes. Can they conclude that the average waiting time of all patients in the ER is LESS THAN 5 minutes? Test at 5% level of significance