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* stats questions
 #140587  
  deric - 11/22/06 13:54
 
  i am interested in practising some stasts questions


can anyone post some for me or post a link tha ti can use

thank you
 
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* Re:stats questions
#568284
  deric - 11/22/06 16:41
 
  someone must ahve stats questions  
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* Re:stats questions
#569193
  deric - 11/23/06 12:49
 
  still waiting  
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* Re:stats questions
#569261
  leschnyhan - 11/23/06 13:29
 
 

Serum LDL-cholesterol concentrations are measured in blood samples collected from 100 healthy volunteers. The data follow a normal distribution. The mean and standard deviation for this group is 130 mg/dL and 20 mg/dL, respectively. The standard error of the mean is 5.0. The 95% confidence interval about the mean is 120 to 140 mg/dL. If blood samples are collected from 25 healthy volunteers instead of 100, which of the following best expresses the expected impact on the standard error and the 95% confidence interval about the mean?
Standard error Width of 95% confidence interval


A ) ↓ ↓

B ) ↓ ↑

C ) ↓ no change

D ) ↑ ↓

E ) ↑ ↑

F ) ↑ no change

G ) No change ↓

H ) No change ↑

I ) No change no change
 
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* Re:stats questions
#569285
  saba111 - 11/23/06 13:50
 
  Is it E?
 
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* Re:stats questions
#569400
  raidenxp2005 - 11/23/06 15:37
 
  deric ...... i feel your pain bro  
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* Re:stats questions
#569979
  leschnyhan - 11/24/06 11:53
 
  Hey friends,
I too think E correct. Can some one explain this.

Hey how come deric, you have not tried this Qn. Sure we can help each other. As raiden said I too can feel your pain. GL
 
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* Re:stats questions
#570275
  deric - 11/24/06 17:24
 
  exam soon
trying to reduce time on internet
 
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