RxPG - the perfect Rx for medical Post Graduate entrance blues!
Mobile Edition | Help/Newbie? | 24/7 Support
HOT | PrePG | MCQ | DNB | Careers | Books | Colleges | Dental | DocIndia | PLAB |  USMLE  | Australia | Canada | GLOBAL | OffBeat!
Articles | Forums | MCQ Crammer | Downloads | Mnemonics | Revision Tools | Recent Shouts | All Features


Biostatistics, Daily Free Online Mock 123 (PGI Pattern)

Author: RxPG, Posted on Thursday, October 16 @ 09:38:58 IST by RxPG  

 FRIEND Add to My Pages   PRINTER Printer Friendly   FRIEND Email Story  FRIEND Download Story  Biostatistics alerts 

Biostatistics

Multiple Choice Test



1) In a clinical trial of a new drug:

Choose 2 of the following options.
1. Randomisation ensures that the allocation of treatment to each patient is a matter of chance.
2. Baseline differences in patients allocated to different treatment groups are eliminated by randomised allocation.
3. Increasing the number of patients allocated to each treatment group will reduce the effect of baseline differences.
4. The null hypothesis is true if there are significant differences in response in the randomly allocated treatment group.
5. None of the above





2) With regard to data describing a population, the following are true:

Choose 3 of the following options.
1. The mode is the most commonly occurring value
2. The mode is usually different in value from the mean
3. The standard deviation is also referred to as the root mean square deviation
4. In distributions which are markedly skewed, the arithmetic mean is a more appropriate measure than the geometric mean
5. The median is the least correct estimate



3) A study of the intellectually handicapped was performed. 112 subjects were put through program A, and showed an increase in their mean IQ score of 6 points. 115 subjects were put through program B, and showed an increase in their mean IQ score of 4. The p value for this difference was > 0.05 .Which of the following is true?

One answer only.
A. The numbers are too large for a Student t-test.
B. The study demonstrates the usefulness of program A.
C. The distribution of individual values is not important.
D. Even though the difference between the means is not significant it would be appropriate to calculate confidence intervals.
E. The above results would be found by chance in less than 1:20.



4) In a trial of a new drug the following results were obtained:- treatment group 44 improved 16 not improved, placebo group 36 improved 26 not improved.

One answer only.
A.The results so obviously show the benefit of treatment that statistical analysis is not required
B. The data could be evaluated using the chi-squared test
C. Pearson's coefficient of linear regression would be an appropriate significance test
D. The numbers are too small to draw any conclusions
E. A Student t-test could be used



5) For the data series: 2, 1, 6, 4, 2

One answer only.
1. The mode is 4
2. The median is 3
3. The standard deviation is 4
4. The mean is 3
5. The mode is 3.5



6) A clinical trial of 'cross-over' design:

Choose 4 of the following options.
1. Requires fewer patients than does a design comparing independent groups.
2. Uses each patient as his / her own control.
3. Requires that each patient receives all of the treatments under examination.
4. Is most useful for comparing treatments intended to alleviate chronic symptoms.
5. It can not be used in clinical trials



7) In order to calculate the 'Number Needed to Treat' (NNT) the following values are required:

Choose 4 of the following options.
1. The number who had the 'control' therapy.
2. The number who had the experimental intervention.
3. The number who responded to the 'control' therapy.
4. The number who responded to the experimental intervention.
5. The number is always an integer



8) A recently discovered treatment for HIV AIDS significantly extends the lifespan of the patient, but does not prevent the disease or lead to its cure.Given this scenario, which of the following statements about HIV AIDS is true?

One answer only.
A. Its incidence will increase.
B. Its prevalence will increase.
C. Its incidence will decrease.
D. Its prevalence will decrease.
E. Both the incidence and prevalence will increase.



9) A random selection of 100 female medical students agree to participate in a study of the possible effects of the contraceptive pill. They are followed prospectively for a period of six years to see if there is an association between the incidence of ovarian cysts (demonstrated by ultrasound) and the use of the pill.How can this study be best described?

One answer only.
A. Case-control study.
B. Randomised controlled clinical trial.
C. Cross-sectional study.
D. Cohort study.
E. Cross-over study.



10) You have performed a study designed to compare the effects of general (GA) as opposed to epidural anaesthesia (EA) on neonatal outcome in a group of patients undergoing elective Caesarean section. 50 patients are randomly allocated to either the GA or EA group.Which of the following tests would be most appropriate for assessing whether there are any differences in the neonates Apgar scores at 1 minute?

One answer only.
A. Analysis of variance (ANOVA).
B. Correlation coefficient.
C. Student's 'T' test.
D. Chi squared test.
E. Logistic regression.


You can discuss the answers and queries of RxPG mediMOCKS in our new mediMOCK Discussion Forum




4 (Excellent) 3(Good) 2(Good) 1(Bad)   


Recommended Books for Biostatistics
 Books to read for Biostatistics by RxPG

Related Biostatistics articles
 Conception of Variables in Biostatistics
 Biostatistics Online Mock Test 222
 Statistics at square one
 Z-test : A Brief Overview
 All the Biostatistics notes you will need for a quick revision
 Response Scales
 Principles of Diagnostic Tests
 Positive predictive value of a screening test
 Biostatistics, Daily Free Online Mock 123 (PGI Pattern)
 Biostatistics: Free Online Mock Test 17 with explanatory answers

Related Biostatistics Discussions

Other articles by RxPG
 RxPG Interview With Dr Sumit Seth - Civil Services 2005 Top Ranker
 Stroke - Neurology Online Mock Test 235
 Stroke - Neurology Online Mock Test 234
 Stroke - Neurology Online Mock Test 233
 List of Some Bioinformatics Courses in India
 Microbiology and Parasitology Online Mock Test 232
 DNB Online Mock Test 231
 Neurology Online Mock Test 230
 Anatomy Mock MCQ Test 229
 Anatomy Mock MCQ Test 228
 Revisable Quick List of New Drugs for PG Entrance Exams
 Radiology Daily Online Mock Test 228
 Pediatrics Free Online Daily Mock Test 227 - PGI Exam Pattern
 Paediatrics PGIMER PG Entrance Pattern Free Online Mock Test 226
 Paediatrics Free Online PG Entrance Daily Mock Test 225
 Preservatives used while packing catgut suture
 Neurology Free Online Mock Test 223
 Biostatistics Online Mock Test 222
 Neurology Free Online Medical Mock Test 221
 Neurology Free Online Medical Mock Test 220

 Biostatistics FAQ
  Browse all FAQs


Write an Article on Biostatistics
You can share your exam experiences, preparation strategies, books you have read or just any information about Biostatistics on RxPG website and we will publish it under your name.

Article Rating
Average Score: 2.75
Votes: 4




Most Read Article
All the Biostatistics notes you will need for a quick revision

Related Links
· RxPG Biostatistics Buster
· Biostat Books at Amazon.com
· RxPG AIIMS Books
· RxPG First Aid For PLAB
· RxPG Postal Course
· Biostat Forum






ARTICLE TOOLS

· Biostatistics section
· Articles by RxPG
· Add to my pages
· Printer friendly version
· PDF version
· Email article
· Feedback on this article
· Medical tutorials
· Related forum posts
· Related articles
· Related downloads
· Submit article
· Biostatistics alerts
· Biostatistics books
· Biostatistics past papers


Most read story about Biostatistics:
All the Biostatistics notes you will need for a quick revision



Server Status: 107 pages served in last minute. Page generation time: 0.042 seconds

Site Maps: [Books] [News] [Forums] [Reviews] [Mnemonics]

sitemap - top30 - centuries - testimonials


About Us :: Disclaimer :: Contact Us :: Reporting abuse :: Terms of Services :: Privacy Policy

Advertise with RxPG!
Made in India by RxPG Medical Solutions Private Limited

"RxPG" is a Registered Trademark

Chrome Web Store YouTube Twitter LinkedIn Wikipedia Facebook