Resolved: Please check the example of my understanding if I am correct?

but according to the salary question in this lecture, the H0 is exactly the statement you make, because it carries a "="(equal sign) in your statement.

That is,

H0 is "the average women height is 1.65 cm"

H1 is  "the average women height is not equal to 1.65 cm"

as presented in the video!?

Thanks!

You can either check for:

1. If you just want to deny the average height is 1.65m regardless the actual mean is higher or lower, you can use two-tailed test ->

H0: average height = 1.65 m || H1: average height != 1.65 m 

or

2. If you believe that it should be lower, then, you can use one tailed (left) test H0: average height = 1.65 m || H1: average height < 1.65 m

btw, pay attention to the unit of measurement too. lol