State the significance level of the test and explain in context type I error

A cable company claims that customers will wait in line is 20 minutes on average. A consumer advocate believes the average wait has increased. 22 customers are sampled. Sample statistics for these 22 customers are: X=26 s = 12 Can the consumer advocate support the claim that the mean wait in line is over 20 minutes? Test using a significance level of 1%