00:01
Hey there, welcome to numerate.
00:03
So we have the standard duration of the post rates of adults being less than 12 ppm.
00:09
So for a random sample of 128 adults, the postways have a standard durer deviation of 11 .3 ppm.
00:16
We have expressed the original claim in symbolic form first.
00:20
So again, we're dealing with our population standard deviation.
00:26
So we denote it as sigma.
00:28
Now, sigma, based on a claim, it says less than 12, which holds true in our sample because our sample sample sample standard deviation is 11 .3 so meaning that this right here is our alternative hypothesis so for part a we're basically going to define our original claim in symbolic form.
00:55
So again, we're dealing with sigma but we're not giving any prior information about the null hypothesis our original claim.
01:02
I'm we're just given above that is less than 12, which is our claim.
01:08
Okay, so we're just going to set it equal to 12 then...