haha i just thought of the greatest thing ever. I'm gonna print out this thread and staple it to the evaluations. Who reads those things anyway?

10/20/2005 1:19:23 PM

someone just balls up and email him the link to this thread.

yeah i'm not gonna do it, but someone needs to

10/20/2005 1:59:40 PM

so should i open the book? is it helpful like examples worked out? cause douche bag mcgee doesnt show us how.

10/20/2005 2:13:22 PM

i forgot that the book came with the answers manual that shows you how to do the problems. i guess ill have to look at that and write all those problems down with solutions for my sheet.

10/20/2005 5:13:23 PM

i'm using the book right now and its making a lot more sense. a lot of this stuff is plug and chug and can be done on the calculator. i've learned more from the book than i have from him.

10/20/2005 5:33:17 PM

yeah i dont go to class i just read the book

10/20/2005 7:34:15 PM

Solutions manual???

where is that? is it the CD? because the CD is weird...for me it's just a bunch of files.

Somebody please tells me where the solutions manual is!

10/20/2005 8:28:06 PM

the solutions manual came with my book.

i seriously hate this guy with everything i have....i'm slowly starting to get some of this, but only from reading the book and slaving over problems. i'm considering telling him that i hate him. what do you think?

10/20/2005 9:11:37 PM

What about a petition? We can pass it out the day after class and collect signatures. We can state on the petition that he does not teach us in terms we can understand, has not responded to our requests and constructive criticism to teach in ways we can understand, and does not seem to care that most of the class is struggling to learn simple basics, nevermind the complicated stuff he teaches. We can make copies and give them to him and the departmental heads and demand a change in how things are done. Perhaps if we get enough signatures we can get somewhere.

10/20/2005 9:22:44 PM

12 problems on the exam? 8 points if you miss one?

edit: oops, just re-read the slides. nevermind

[Edited on October 20, 2005 at 9:44 PM. Reason : .]

10/20/2005 9:40:04 PM

so how many questions is on this bad boy?

10/20/2005 10:00:16 PM

^ 7 mulitiple choice, 5 "open-ended" have-to-work-them-out problems weighted more.

10/20/2005 10:34:22 PM

7 mc are 3 pts each. 5 open ended are 5 points each

10/20/2005 11:17:41 PM

Quote :

"i'm considering telling him that i hate him. what do you think?"

LOL i think i'd hold off on that haha







so do you all think that the practice probs he posted for us to review should be on our study sheet?
did he say those would def be on there somewhere?

10/20/2005 11:24:24 PM

I worked out all of the practice problems just as part of my studying and i think I am going to include some of them. But a few of the practice problems were a lot like other ones, so hey aren't all worth writing down.

10/21/2005 12:36:34 AM

how do you find the probability between two points? like x is greater than 2 but less than 6?

10/21/2005 9:55:26 AM

Look at the lab 4 solutions...it shows how to do them there

10/21/2005 10:38:37 AM

do you think we will get the binomail chart and the standard normal chart or the t table?

10/21/2005 11:13:26 AM

Can our cheat sheet be typed?

10/21/2005 11:15:11 AM

i think we get both

10/21/2005 11:15:55 AM

its not suppsoed to be typed but who cares

10/21/2005 11:16:52 AM

i didnt think it was too bad....

no real complex/tricky problems anyway

short exam

10/21/2005 12:54:53 PM

the MC wasn't too clear again... and slightly obscure but i think i aced the short answer ?'s hopefully it'll balance out.

10/21/2005 1:28:48 PM

Slight improvement, but I'm still pissed.

rally, you felt it was short. Along with about 5% of the class. The other 95% was straight PISSED OFF b/c that test was entirely too long for 50 minutes unless you just KNEW without a shadow of a doubt how to approach every single problem w/o even trying stuff out.

Second, what is this moron's deal with "None of the Above" type answers?! For one of those multiple-choice problems on the front I chose C, I hope that was correct. Geez I want 3 or 4 straight-forward answers you freak. However, I felt good about those since I wrote down like every definition I could find so I *THINK* I got 'em right.

Also, why did he even tell us to study chapters 6 & 7? I'd say 90% of this test (if not more) was Chapter 8. What sucked about this is that if you KNEW those "p-values, proportions, Ho,Ha tests, etc." then you ACED this test. However, there wasn't really any older chapter problems to help those who still weren't stable w/ those hypothesis tests and stuff...which isn't too much to ask since Reich refused to hardly teach this section at all during class.

I'd say hopefully speaking I got 80% of this test right, however I could EASILY be very wrong. The slight variations of the hypothesis tests freaked me out...I couldn't figure the last problem out to save my life but I got the 1st problem on the final page of problems done w/o a hitch (thanks TI-83, I owe you one).

Anyway, it's obvious this guy won't change. We've gotta somehow manage the rest of the semester just stomaching that fact. Hopefully he'll be a generous curver, as grad students are VERY used to high curves. Case in point, my roomie in a 500-level stats. test he took last week said his professor counted any score from 75-100 an "A". Hopefully he'll hook us up at the end of the year. Ah well, off to celebrate my 21st


[Edited on October 21, 2005 at 1:37 PM. Reason : /]

10/21/2005 1:36:05 PM

^ oh, sorry... i think i was the first one outta there but i just assumed people would be finishing shortly thereafter too...


once again the practice exam was nothing like the real exam though...

in this case he left out all the tricky p value & confidence interval questions though...


the only thing that seemed unfair were the 95% Confidence interval questions where it was A) or B) or C) none of the above....


also since he didnt actually review for the exam I can understand if anyone had trouble with the Ho and HA questions at the end...

[Edited on October 21, 2005 at 2:43 PM. Reason : a]

10/21/2005 2:36:28 PM

I had trouble with the ones at the end. Took me the whole class time and I'm just hoping for some partial credit on those.

10/21/2005 2:39:44 PM

shit i thoght it was hard number nine and 10 were hard as hell

10/21/2005 2:51:50 PM

I hate that man very, very much

Hypotheses were my trouble area. And basing most of the test on material he KNEW alot of the class didn't understand fully? In my opinion, he was purposefully trying to be an ass.

10/21/2005 2:54:14 PM

yea, complete bullshit about the ha ho questions.

I wish I would have included more about those on my cheat sheet since I used up like 1.5 of it on chapters 6 & 7 which weren't really on the test.........

10/21/2005 3:02:07 PM

I want him to get run over by a bus....is that bad?

10/21/2005 3:55:02 PM

No. He's a gay Golden Gopher.

10/21/2005 4:21:27 PM

I was only completely sure that I got 2 answers right, and one was because we had a webassign just like it, the other i could do on my calculator.

So I pretty much failed, even though I have excellent lab/webassign grades and can understand the problems in the book.

WHAT THE HELL IS THIS GUYS PROBLEM??!?

I don't know whether to laugh or cry

10/21/2005 4:51:45 PM

yeah thank god i had studied that Ho and Ha crap because there was a lot more then I thought!!! Thatteat was not balanced, and he has got to provide us with better prep questions to be ready for the tests.

10/21/2005 5:04:49 PM

fuck yeah it wasn't balanced. What was he thinking?? "Oh, I'll put 3 multiple choice questions on confidence intervals, one word problem about them, skip chapter 6, and do the rest on hypotheses. That should ensure a balanced test"

I wonder if he knows that his POPULATION hates him infuriatingly, with a STANDARD DEVIATION of 0.

10/21/2005 5:33:09 PM

^ haha

0 divided by the square root of 400 students



i think the answers to those three related multiple choice questions were A, then B, then C (none of the above) but i dont rmemeber the test other than that

10/21/2005 5:51:41 PM

In my notes I had that a 90% confidence interval means that if you take different intervals many, many times 90% will contain the true population mean.

That's the definition he gave us, and yet I didn't see any choices even remotely like that. "Can be described by a binomial distribution"....um, hello...what the hell?? I don't remember anything like that in the notes

10/21/2005 6:05:37 PM

i think it means that there is a 90% chance that the true mean lies within your stated interval...


there is a 100% chance that your sample mean lies in that interval

10/21/2005 6:11:54 PM

Quote :

"i think it means that there is a 90% chance that the true mean lies within your stated interval..."

and straight from his notes:

"Interpretation 1: The probability of u being in the interval is .95

This is incorrect! x bar is random, u is not.

Interpretation 2: If we repeat the process of generating confidence interval many many times, in the long run, 95% of the interval will contain u

This is correct!"

I mean, what the HELL??

10/21/2005 6:22:15 PM

well shit...

thats not how i understood it...


im not a fan of this guy

[Edited on October 21, 2005 at 6:26 PM. Reason : a]

10/21/2005 6:24:47 PM

so i think our grades are posted on webassign

10/21/2005 8:46:51 PM

Just check webassign, I hope my score is before the curve.

10/22/2005 12:39:12 AM

You score is with the curve included. B/c the max score was a "51", but the most points you can get (before a curve) was "46" on the test.

Thus someone actually got a 51 outta 46, or one helluva nice A+.

10/22/2005 1:07:18 AM

^gd are you fucking kidding me? He is going to have to curve this whole class. i hope its not already included!!

10/22/2005 4:23:22 AM

Ok, so the class average AFTER the curve was a 58%???????!!?!?!


My blood is boiling I'm so pissed

10/22/2005 10:54:09 AM

i got a 45 after the curve.

i cant tell you how it feels to finally be the one who isnt failing the class...

i love the business school


the funny thing about this class is Im sure everyone is cheating on the tests... teh only problem is that so few people know how to do it that cheating isnt all that helpful.

The p hat of sitting next to someone who knows how to do this stuff is like .05

1.96 * sqrt of .05 * (1-.05)/400 for your CI

[Edited on October 22, 2005 at 12:38 PM. Reason : a]

10/22/2005 12:30:57 PM

Hahah yeah the girl sitting next to me is in my lab and in the middle of the test she's like "can we trade cheat cheets for a few?"

10/22/2005 12:42:01 PM

how do you know the class average....

10/22/2005 1:08:30 PM

The class average was 29.7, or ~64%, which is HORRIBLE.

It shows "Average" if you look at your grades in WebAssign. It's under "Class Statistics".

10/22/2005 1:38:09 PM

Here's help on WebAssign #6:

Problem 1: Just remember that = vs. /= are TWO-SIDED, thus double your p-value before entering it in the box. < vs. > problems are one-sided, so the p-value you find stands as-is.
Just bust out your TI-83, go hit: 2nd, VARS, option #2 (normalcdf(), then enter whatever your given z-value is, followed by a comma, followed by "2nd + , + 99" (without quotes). This simply tells your calculator give the pvalue from your z-value to infinity. Make sure you double that value it gives you for = vs. /= problems, and make sure you use 1-(the value you get) for the Ha: < problems. Ha: > problems just enter the value you get.

Problem 2: Whatever red number is given in this sentence: "claimed that more than 73% of all employees" is BOTH of your p< and p> values.

In: "Suppose a follow-up study is conducted in which 420 employees are selected at random and asked (confidentially) to indicate whether they had called in sick when they were not sick during the past year. A total of 280 employees admit that they had done this., Divide the smaller number (those who admitted it) by the larger sample number. In this case, 280/420 = .66666666666

That's your p-bar value.

For your z-value, on the TI-83, go to STAT, TESTS, option #5 (1PropZTest).

Enter .73 for p, the amount of those who admitted it for x (280 for me), n= the larger number (420 for me), then highlight the ">po" and hit calculate.

Your Z-Value is given, that's your answer.

If the z-value is LARGER than your alpha (probably .05), then you don't reject. If it's smaller, you reject. Just type what's appropriate for you in the textbox.

Problem 3: Use your TI-83, go to: STAT, TESTS, hit "0" (zero), make sure "Stats" is selected, and now enter your data that you're given. Make sure "pooled" says "Yes". Then hit calculate.

Now it'll give you negative numbers. I've learned that webassign wants positive values. So for example, if your C.I. is (-9.5, -8.4) you'll need to enter (8.4, 9.5) into webassign for both 90% & 95% confidence intervals.

For b, if you have the value "10" in both intervals, it's "YES" because $10 overlaps in each interval. If not, it's NO because there's not sufficient evidence in both CI's due to no overlap of $10.

Problem 4:
a) Just subtract the MEAN from Population 1 from the MEAN in Population 2. If you get a negative number it's alright, just enter like -1.12 in there and you're good to go.

b) Gotta work this by hand. SQUARE ROOT the following: s1^2/n + s2^2/n
In other words, square the sample standard deviation from population 1 (s1) and divide by 20 (n=20 since they're taking 20 samples from each, per the problem) and ADD it to the square of the sample standard deviation from population 2 (s2) and divide by 20 (n=20). Now once you have that answer. I had sq. rt. of 1.03105 which = 1.015406

c) Here you're finding a Z-Value first. Use that same 'old formula for finding a z-value that we've been using in past chapters. Since we want p>0, Use: (p-d's expected value)/d's standard devation. I had (0- [-1.12])/1.015 = 1.12/1.015 = 1.10344

That's your z-value. Now, with that on your TI-83's screen, hit: 2nd, VARS, 2. Now type in your z-value, hit comma, then put 'E99' and close the parenthesis. "E99" can be inputted by hitting: 2nd, 'comma button', then 99. This gives you the probability from your z-value to infinity. I got .1349 That's the answer webassign wanted.

The book even does a pretty piss-poor job of explaining the problems addressed in this webassign, so I'm terrified to see him attempt to explain it. Anyway, hope that helps yall, and just PM me for my PayPal address where any donations would be GREATLY appreiciated

10/23/2005 9:22:48 PM

hahah southpaw you are on top of the game. so how did you do on the test yourself?

i got a 38/46 or an 83 which i am very happy about. feels good to have a little weight off the shoulders.

10/23/2005 10:16:42 PM