JotCast | MTH 220 May 22 Open Questions

MTH 220 May 22 Open Questions

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Kasey

to get 2.4

8:25

then you do 4 times .6

Greg Miller

8:25

Not times

Kasey

8:25

no it's 4 right

Greg Miller

8:25

Ok.. the "bottom" is .6 divided by sqrt(16)... did you forget square root again?

Kasey

8:24

yes and that is -.5

Greg Miller

8:23

Xbar - mu = 6.3 - 6.8... did you get that for the "top" of the test statistic?

8:22

Hold up.. but I don't think so.... let me check...

Kasey

8:22

I got t=-.2083. Is that the right direction?

Greg Miller

8:09

Yeah... the cutting and pasting is something we all do in document creation and RE-creation that it's just a simple error to make..

Kasey

8:09

Oh man I've done that before too I'm sure. Bet it's hard not to hold it against them!

Greg Miller

Well, at least we know where else you are applying!!

8:08

"I'm hoping you will consider my application for graduate school in statistics at Georgia Southern University"... uh... oops!

Kasey

8:07

So it happens to everyone and everyone does it! lol

Greg Miller

8:07

I've had prospective grad students send me cover letters to apply to grad school that read...

Kasey

8:06

There would be times we would get into court and the title or style of the case document would be changed but then there would be other clients names throughout the document. We would reuse if case facts were similar... Accidental violation of client confidentiality.

Greg Miller

8:04

At least.. that's what I'm betting... which is fine...

Then... does a 90% CI...

8:03

Yeah... that's prolly just him arguing that he thinks Type II error is worse.. so he personally sets his alpha at .10

Kasey

8:03

It happens. I saw where Ben said he used a 90% confidence level and I was like where is that!

Greg Miller

7:59

I copied and pasted to try and keep the instructions "similar".. but I didn't change teh word "is" for "isn't"... blah.

Ugh.

7:58

I am typing so many dang worksheets that I've been burned two or three times this Maymester on cut and pasting..

Kasey

7:58

There is no angry face so I had to put a sad face. lol

7:57

Oh Dr. Miller... What did I tell you about those typos... I'm like searching and searching and I'm like maybe everyone else knows something I don't. Where is this! I promise I don't ask just to point out typos. I legit am like I don't see it!

Greg Miller

Evaluate the Type I and II errors and defend your choice of alpha

7:56

Yep... pick it.

Kasey

7:56

So we pick one?!

Greg Miller

7:55

Typo.. don't kill me.. it's not provided

Kasey

7:54

Ive reached the part where we discusss the significance level. the question says it's provided and then to answer the question in the box above concerning type 1 and 2 errors. Am I missing them?

Greg Miller

7:43

It's Friday!

Kasey

7:43

Ok sorry about that. I think I might be tired and not thinking straight.

Greg Miller

Sometimes.. it's provided to you as a time saver... someone else has done it before you came along and you get the benefit.

7:42

Sometimes.. you get raw data values and YOU calculate X-bar and YOU calculate s from scratch...

7:41

I'm providing you the sample standard deviation (s) so that when you get to the test statistic step you don't have to stop and calculate it from the raw data itself.. that's good b/c you don't actually have the raw data to look at in this problem

7:40

Test statistic uses "s".. now you know it.

Kasey

is this mu?

7:40

ok I know this is silly but idk what to do with it!?

Greg Miller

7:38

You're Welcome.

7:37

Sometimes you get a freebie and don't have to calculate s yourself...

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