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+--- Thread: NBME 11 block 2 q 1 to 50 - maryam2009 (/showthread.php?tid=586776)
0 - ArchivalUser - 06-07-2011
*****************Correction************************************
12.FFF
The dissociation curve shifts to the right when carbon dioxide or hydrogen ion concentration is increased. This facilitates increased oxygen dumping. This mechanism allows for the body to adapt the problem of supplying more oxygen to tissues that need it the most.
The general equation for the Haldane Effect is: H+ + HbO2 ←→ H+Hb + O2
posted by sara84
Thank you
0 - ArchivalUser - 06-10-2011
1.CFABB
6.BDEDC
11.DFCAB
16.ADEBD
21.EEDCE
26.CADCF
31.CADBF
36.CABBB
41.CADAB
46.EEDEB
0 - ArchivalUser - 06-13-2011
correction
19.BB
Warfarin
0 - ArchivalUser - 07-06-2011
hi maryam
regarding 16.
ther are askin to compare proportions and not means so shouldn't chi square should be used instead?
please clarify.
0 - ArchivalUser - 07-07-2011
think it's important to know these two first;
1-"Interval variable" (values from where we can drive their "Mean")
e.g. measurements of B.P, Weight, Cholesterol levels etc
2-"Nominal variable" ( different categories or "GROUPS")
e.g.
*Gender ---is a Nominal that has Two Groups (Male and Female)
*AGE-------is a Nominal that we can have either TWO groups (Elderly and Middle age) or
THREE Groups(Elderly, Middle-age and Children) etc
*Race------a Nominal that can have many groups
Two groups (African Americans and Latino)
Three groups(African Americans, Latino and Asian) and so forth
e.g.
*"GENDER"(Men and Women)....................................................(Single Nominal)
*"GENDER"(Men and Women) n "RACE"(Caucasian and African)....(Two Nominals )
e.g we compare Blood Pressure measurements
*INTERVAL variable ("MEANS" of B.P measurements)
*NOMINAL variable ("GROUPS" )
so to compare MEANS of B.P. b/w two are more groups we do these tests
t-Test:
1 Interval (Blood pressure Means)
1 Nominal with "ONLY TWO GROUPS"
e.g. comparing the BP means b/w (Latinos) and (African Americans)
*for a t-Test it will be a wrong statement to say
e.g comparing B.P means b/w (Latinos), (African Americans) and (Asians)....*got 3 groups
Now what's the difference B/W t-Test and ANOVA
t-Test------>ONLY TWO Groups comparison
ANOVA------------>TWO Groups or more than Two Groups comparison
NOTE:these two will give u the Identical results if comparing "TWO Groups"
t-Test................... 1 Interval and 1 Nominal with TWO Groups
One-way ANOVA.....1 Interval and 1 Nominal with TWO Groups
and for the above reason they rather use One-way ANOVA when more than two groups are there to be compared e.g as above
comparing B.P means b/w (Latinos), (African Americans) and (Asians).......3 groups
Two-way ANOVA:
1 Interval
2 Nominal e.g. Gender (Men and Women) *AND Race (Caucasians and African Americans)
---->we do these tests to see If there is a Difference b/w groups ?
t-statistics (t-Test) and f-statistics(ANOVA) will be compared to get a p-value
If p-value = 0.05 or less -----it is said to be "Statistically Significant' and we say that there is a Difference in these Groups.
Chi-square:
we compare b/w "TWO NOMINAL" (with ANY # of GROUPS)
(Note; we are not using any Interval variable here , just the NOMINAL data)
best example...."Testing Drug Efficacy"
First Nominal........(New drug group) and (Placebo group)
Second Nominal ...(Recovered group) and(Not recovered group)
***I think this is all u have to do is recognize what kind of data is presented , how many Nominals, How many groups and If Interval variable is used or not?
1 Interval and 1 Nominal (Two Groups).......................t-Test or One-way ANOVA
1 Interval and 1 Nominal (More than Two groups)........One-way ANOVA
1 Interval and *2 Nominal (many groups)....................Two-way ANOVA
.....................*2 Nominal (any# of Groups).................Chi-square
is posted by Sarim
0 - ArchivalUser - 07-07-2011
hi maryam, i will really appreciate if u send me nbme 12 plzzz not any website i cannot open it
my email :drmmhshamim
0 - ArchivalUser - 07-07-2011
hi maryam, could u send me nbme 12, plz not website. my email :drmmhshamim
i will really appreciate.
0 - ArchivalUser - 07-07-2011
************************************************************************************
This post is just for NBME explanation,please do your request in a separate post.TY
***********************************************************************************
0 - ArchivalUser - 07-07-2011
hey .maryam 2009, can i have ur email id plz
0 - ArchivalUser - 07-09-2011
Hi nf2011 I would be glad if you could send me any NBME you ve got . my email: monicaszczsn, waiting your answear, Thanks