An article in the local newspaper claims that the customer service at the local bank is of poor quality because customers need to line-up on average for 5.79 minutes. The manager of the bank is not convinced that this claim is indeed correct and decides to undertake a survey of customers. She hires a student to measure the time spent waiting in line by a random sample of 30 customers. Using a stopwatch, the student determines the amount of time between the time the customer joined the line and the time he or she reached a teller, with a precision of one tenth of a minute. These waiting times in bank line-up (WT, are in minutes).

Specify the null and alternative hypothesis for the above case?

I think the answer is:

Null: m = 5.79 (average time is 5.79

Alternative = m<5.79 (average time is less than 5.79 minutes)

Am i correct?