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MTH 220 May 12 Open Questions
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AvatarGreg Miller
7:27
Sounds good.. see you then
Kasey
7:27
Alright! I'm sign off and see you in the morning as I'm sure I will have more questions.  Thanks!
AvatarGreg Miller
7:25
Doing the first several homework assignments and being careful with your level of detail will REALLY pay off as we go... good questions.
Kasey
Awesome. Ok I think I'm getting it but from the get go I could tell I wasn't being specific enough with the population and I think I'm understanding that better now.
7:24
Yay that's great that we did well on the quiz especially since we didn't know what to expect.
cool 1
AvatarGreg Miller
7:24
Kasey.. yes exactly.. that's the value of "p" that is being tested in the hypotheses.
Kasey
7:23
Ok thanks! SO where does the on-time rate of arriving flights at 84% come into play?  With the null hypotheses?
AvatarGreg Miller
7:21
But, I was SUPER pleased with Quiz 1.. ya'll knocked it out of the park.. really good start on quizzes today.
7:20
Reading Comprehension skills in Statistics is HUUUUUUUUUGGGGGEEEEE!
7:19
Oh.. for SURE.. the learning is in the details.. this is a VERY detail oriented subject.  VERY.
Guest
7:19
Now I see why you say read carefully at the beginning of every email.. lol
AvatarGreg Miller
7:19
So, how about:  all D32 arriving flights at Denver International during a winter weather advisory.  See how specific that is?
Realize, the data set is being taken DURING a winter weather advisory..
7:18
...and honestly.. I think we can add more thing to that..
7:17
Good yes... I think that's on point.
Kasey
7:17
Ok so here the population would be: flights arriving to runway D32 at Denver International Airport.  the sample would be the 12 flights scheduled to arrive on runway D32 at Denver International Airport.  ?
AvatarGreg Miller
7:16
When you do your SPECIFIC MSW research in your field, you are going to want your results to apply to a specific population.. probably of people.. and you aren't going to want to be guilty of overgeneralization.. you can protect yourself from that by defining populations clearly and precisely with a lot of detail.
7:15
that's why a population has to be specific.. so that you DON'T overgeneralize your research results when you are done.
think about it.. not all runways are the same at the airport.. some are used in one way.. some in another.. some short.. some long... some international.. some domestic.. the list goes on and on..
7:14
you definitely identified two of the key components.. but they are focused on a specific runway..
7:13
but just barely...
Kasey
7:13
Ok there is my problem because I thought it was arriving flights at Denver International Airport which is too broad.
AvatarGreg Miller
7:13
so "arrivals" is important.  "Denver" is important" and "runway D32" is important.
7:12
the specific runway needs to be mentioned in the population as well... all 12 flights in sample came off the same runway
Kasey
7:11
or all Denver flights
AvatarGreg Miller
7:11
Looking at problem.. just a sec...
Kasey
7:11
gotcha. so for example with the airport case the population is arriving flights to Denver not just flights in or out of Denver
AvatarGreg Miller
7:10
Kasey.. sure... this chat is wide open.. clarify anything... no reason to wait on getting things clarified.
7:09
The sample is a PART of the population... it should represent the population. So, if the sample is full of freshman.. that's who we intend to be representing.
Kasey
7:09
Is it ok if I clarify this with the homework here?
AvatarGreg Miller
That level  of focus... and the face that ONLY freshman appear in the sample guides us to realize the population being studied only is centered around freshman.
7:08
Notice ONLY freshman appear in the sample... and there is a focus on freshmen throughout the description.. that focus appears FOUR times in the original problem description
7:07
Ok.. so here is why the population isn't "all of SFA":
7:06
Let me grab my copy  of that worksheet right quick....
Kasey
I first thought that the population was all of SFA.
7:06
So like in the SFA example you gave us about freshman getting tickets.
AvatarGreg Miller
7:06
Often, it does need to be specific... repeating the level of detail given in the original description of the problem
Kasey
7:05
I worried that my idea of the population is too broad.
AvatarGreg Miller
7:04
Well, if you want.. . you can share thoughts in here or in morning Zoom's... or through email..
7:03
The keys to quizzes get posted every day right after I sent grades out.  Like the one I posted today, each quiz key contains a detailed reference to where you can find help if missed a particular question
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