Friday, March 25, 2011

Spring Term 2011

Here is where you can post comments (your questions) to Barry for classes he is teaching during Spring Term 2011.
If you have never posted a comment to this blog before, please read "First Post" before continuing.
Have a great Spring Term!
Barry
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29 comments:

  1. AnonymousMarch 30, 2011 at 3:03 PM

    Loren S. MTH243 MHCC
    I am having trouble opening the course supplement file. I use Firefox with Windows 7, and I have a decent connection. The other docs on the portal open just fine for me. Is anyone else having this problem, or are there any tricks I'm missing?

    ReplyDelete
  2. Barry EdwardsMarch 30, 2011 at 6:12 PM

    Loren,
    The supplement is a "pdf" file. It requires Adobe's Acrobat Reader or a Mac to view. Google "Adobe Reader", then download the reader. Once the reader is installed, you can double-click on the file and the reader will open with your supplement.
    Barry

    ReplyDelete
  3. AnonymousApril 6, 2011 at 11:08 AM

    please read your pcc email
    thank cheryl m

    ReplyDelete
  4. AnonymousApril 11, 2011 at 10:06 PM

    Jean G, Mth243 MHCC
    P.S. counting rules, verifying homework, #4, having trouble setting this one up. Not sure, factorial?

    ReplyDelete
  5. Barry EdwardsApril 11, 2011 at 10:27 PM

    Remember, there are eight digits (2 through 9).
    Now use the Fundamental Counting Rule to count the number of seven digit phone numbers possible (8^7).

    ReplyDelete
  6. AnonymousApril 16, 2011 at 4:10 PM

    Problem Set: Probability Question #3, d. & #4 C. How do you set these up?

    ReplyDelete
  7. Barry EdwardsApril 18, 2011 at 6:02 AM

    Problem 3d:
    P(not Freshman)+P(Upper classman)- P(both) (Addition rule)

    Problem 4d:
    P(at least D)=1-P(F) ("F" is the complement of "at least D")

    ReplyDelete
  8. AnonymousApril 18, 2011 at 10:14 AM

    Dear Barry I can not seem to find the quiz files on my course for your Monday and Wednesday class from 12noon to 2:20pm.

    ReplyDelete
  9. AnonymousApril 24, 2011 at 2:00 PM

    Problem set: probability
    How do you set up question # 5d?

    ReplyDelete
  10. AnonymousApril 24, 2011 at 2:06 PM

    Problem set: probability
    and how would you set up # 5c?

    Thanks

    ReplyDelete
  11. AnonymousApril 24, 2011 at 6:55 PM

    Mth 243 - MHCC
    PS -discrete random variables, pg. 37.
    Trouble with setup on #4 & #5. I think #4 is x=35, n=20, p = .59 then 1-binomcdf(35,.59,20)=.52465. On #5 I'm setting up the same way, 1-binomcdf(12,.53,8) = .10658.?Thanks,

    ReplyDelete
  12. Barry EdwardsApril 24, 2011 at 7:22 PM

    On problem 5c, the word "assuming" means the same as "given".
    P(male | <40K) = P(male and <40K) / P(<40K)

    On problem 5d, the key word is "or".
    P(male or <40K) = P(male) + P(<40K) - P(male and <40K)

    ReplyDelete
  13. Barry EdwardsApril 24, 2011 at 7:31 PM

    On problem 4 in "Discrete Random Variables":
    n=35, p=0.59, k=20
    P(X>=20) = 1 - P(x<=19)

    On problem 5 in "Discrete Random Variables":
    n=12, p=0.53, k=8
    P(X>=8) = 1 - P(x<=7)

    ReplyDelete
  14. AnonymousMay 4, 2011 at 8:46 AM

    MTH 95 mondays and wed at 12 @ PCC

    Hi Barry
    It's Star from ur MTH 95 class(I came with my daughter on mon)
    I cant get onto mypcc from my phone so I have to leave u a msg on here
    After I seen u on monday I had to be rushed to hospital with severe stomach pains. They sent me home and now pains are back so I am going to hospital again. Don't know how long I will be there this time so I wont make class. Can I turn homework in on monday? Is there anything else I'm going to miss? What is the new homework? My Bio teacher asked for a doctors note, do u need one too? Can u please email me back at sstarlite21@aol.com. that way I can read it on my phone
    thanks so much
    star

    ReplyDelete
  15. Barry EdwardsMay 4, 2011 at 8:51 AM

    Star,
    Just get well. Don't worry about a note. We'll fix things in class after you get well.

    ReplyDelete
  16. AnonymousMay 9, 2011 at 5:48 PM

    I am reviewing the math midterm,
    on 2a, P(no more than 28 days) Is binomialcdf(n,p,k) right?

    ReplyDelete
  17. Barry EdwardsMay 9, 2011 at 9:30 PM

    Yup.

    ReplyDelete
  18. AnonymousMay 9, 2011 at 9:39 PM

    Referring to 2a, how would binomcdf(n,p,k) work? theres no percentage or sample size. i think normalcdf(-e99,28,28.3,5.4) works better. Right?

    ReplyDelete
  19. Barry EdwardsMay 10, 2011 at 6:06 AM

    I won't comment to the inputs for the command, but for a problem about a "normally distributed" random variable, the normalcdf command works nicely.

    ReplyDelete
  20. AnonymousMay 15, 2011 at 5:26 PM

    Mth 243 - MHCC Jean G.
    Hi Barry, on the Lab assignment, page 68, President's Age Data. I'm trying to set up my Window on my calculator to do the histogram and boxplot. I'm getting close to what looks like a good graph but if I change my numbers to higher or lower numbers the graph gets too big or little. I'm using Xmin=
    -25,Xmax=70,Xscl=15,Ymin=
    -25,Ymax=70,Yscl=15,Xres=1. I have min=42,Q1=51,med=55,Q3=58,max=69. Am I anywhere in the ballpark?

    ReplyDelete
  21. Barry EdwardsMay 15, 2011 at 8:20 PM

    Try Xmin = 40, Xmax = 70, Xscl = 5, Ymin = -5, Ymax = 20, Yscl = 5. Your Xmin and Ymin were way too low.
    Adjust in small amounts from the settings above.
    Barry

    ReplyDelete
  22. Jean GMay 16, 2011 at 8:47 PM

    mth243-MHCC Jean G.

    Oh yes, much better. Thanks.

    ReplyDelete
  23. AnonymousMay 26, 2011 at 11:14 PM

    has the "my course files" been updated lately?

    ReplyDelete
  24. Barry EdwardsMay 27, 2011 at 8:45 AM

    "My course files?"
    What do you mean? Who are you and which class are you in?
    Please read the "First Post".
    Barry

    ReplyDelete
  25. AnonymousMay 27, 2011 at 10:06 PM

    oh sorry, I from MTH-95-0-27589 and I know i miss one class activities. So I try to look for it in the "mycourse files" but it wasn't there. And the second take home quiz wasn't their either. I was just wondering.

    ReplyDelete
  26. AnonymousMay 30, 2011 at 10:22 AM

    Mth243-04, from Jean G.,
    I'm reviewing homework and prepping for final, if you'll have an EDA problem, need help on process. For PS-EDA, pg. 69, I'm following all the steps we did in ours teams, following steps 1 thru 4 on pgs. 64 & 65 & 66. Is that correct to do all 4 steps?

    Also I'm still having some trouble with setting up correct Windows in step 3. For #1, I have minX-3.3, Q1-5.3,Med-6.15, q3-10.4, MaxX-14,5. I've been trying Xmin-1,Xmax-16,Xscl-2, Ymin-1,Ymax-16, yscl-2 with no luck, I've been adjusting each of them by just a few also.Maybe I'm not understanding what values match up with the Windows values?

    ReplyDelete
  27. AnnetteMay 30, 2011 at 5:35 PM

    Hey Barry, I'm having some issues with hw page 45, CRV #3, e & g, I got the others, but just can't figure those two out. Also 1, 2, and 5, can you point me in the right direction, im just blank.

    Thnaks, Annette

    ReplyDelete
  28. AnonymousMay 31, 2011 at 9:50 PM

    Mth243-MHCC, Jean G.
    Hi Barry, I wanted to stay for after-class time, but had to get to work this morning. I think I figured out the questions about EDA. However, I'm having similar problems as Annette with CRV, pg. 45&46, just realizing I passed over and forgo to go back and finish these problems. I'm probably using the wrong function. For #4 IQ>15 in calc.: normalcdf (115,E99,100,225) and I get .4734234648. #4c, in calc. normalcdf (140,E99,100,225) = .429448754. Also #5, I was setting up as mean=$86, S.D>=$11.50, p<$100. $86-$100/11.50=

    ReplyDelete
  29. AnonymousJune 1, 2011 at 10:46 AM

    mth243mhcc, Katrina
    Hi Barry, I'm going over the homework & making my notes and I realized I didn't do PS: Correlation & Regression Pg81. Was it assigned?

    I have PS:Sampling Dist's pg 74, ass'd 5/17 and PS:Confidence Intv's pg 89, ass'd 5/24. Can you confirm which problem sets need to be done.

    Thanks!

    ReplyDelete

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