Biostatistics mcq questions and answers
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None of the above answers is correct. All you need do then is to type whatever you want into the label box for the chosen variable. What is the only index that measures attachment loss? A 1 B 2 Correct Answer C 3 D 4 Ans:- B 79 The Turesky Modification of the Quigley Hein has a range of scores of what? Ans:- B 68 The Pl I measures what? They help lead to the prevention of disease, create quantitative evaluations of intervention programs as well as determine safe and effective new drugs, and other procedures. A score of 3 on the Turesky Modification indicates what? Since computed value is greater than either one tail table value or two tail table value we will say that the population means of healthy children and children suffering from cystic fibrosis are not equal. In regression, we should never extrapolate beyond the data.

Is the relative risk 2. The natural graphical presentation is a scatterplot. The mean and standard deviation of the transformed data is a. A Excellent B Good Correct Answer C Fair D Poor Ans:- B 82 Describe the disadvantages of the case control study A A cohort is different because an entire cohort of exposed individuals is examined. Biostatistics covers, overlaps and to some extent is analogous to vital statistics e. Vertical tables are easier to read than horizontal ones. Ans:- A 88 Describe the ecologic correlation A It is the best because if the sensitivity test correctly identifies all potential cases as either negative or positive.

Conduct the program several times in a variety of settings with a variety of participants. This makes sense, because in these circumstances the larger variance has much more impact on the standard error than does the smaller variance. B the units of analysis are groups. A Turesky B Eastman Interdental Bleeding Index C Sulcus Bleeding Index D Periodontal Screening and Recording Index Correct Answer Ans:- D 21 Recurrent caries fall under which category? Some histogram programs or rather histogram programmers are very uncertain about what happens on the boundary. Ans:- B 90 Describe the drawbacks of the ecologic study A are used very commonly in environmental epidemiologic research.

The variance of a sample of 81 observations equals 64. This is undoubtedly a wide range and the lower limit looks quite low for an adult. A True Correct Answer B False Ans:- A 26 What is the agent when studying oral epidemiology? For the same reason as with C, these two events are represented as combined into one primary outcome and more information would be needed. In computing from grouped data, a. This is the ability of a test to identify only those non diseased individuals who actually do not have the disease C. However, I started, so I should finish.

Is it enough just to mention the results? Simple Lin ear R egression b. If a patient has teeth indicated for extraction for orthodontics, are they included in this index? Th e Pears on corr elatio n coefficient between two variables,. If I did that, what would be happen? Applied Biostatistics: Questions and Answers This website is for students following the M. B A clinical trial refers to a research activity that involves the administration of a test regimen to humans to evaluate its efficacy and safety. None of the above answers is correct. It helps to generalize the study to the population B. Contributing factor to an illness is defined as A.

None of the above answers is correct. None of the above answers is correct. Sa mpl ing err or e. None of the above answers is correct. The range is a 60 b 70 c 60 d 100 Answers: 301. Answer We expect about 95% of observations to be within two standard deviations of the mean and about 5% to be outside these limits. Can I use the concept of 'Number of positives' instead of that of 'Number of negatives'? Because there is one value much higher 96 bpm , this skews the data to the right, or it moves the mean towards the right.

B Mass screening is defined as the standards of care, anyone that could at risks should be screened for exposure. Answer The assumption of a Normal distribution is required for the P value for the correlation coefficient. The content of a package is only available when a package is loaded using library function. At the end of each test you can get your results. A Excellent B Good C Fair Correct Answer D Poor Ans:- C 73 A Code 4 on the Loss of Attachment Index indicates what? While dealing with your biostatistics assignment, you may need some demographic materials on the birth rate or some other data — our experts can find any material that you need for your homework. The sum of deviations of the individual data elements from their mean is a.

Chapter 18: Relative risk, relative and absolute risk reduction, number needed to treat and confidence intervals. None of the above answers is correct. Ans:- B 96 Define Clinical trials A involves the administration of a test regimen to humans to evaluate its efficacy and safety. Selection bias occ urs in case control s tudies but not in cross-sectiona l prevalent studies. Which index would you use to calculate decay? In a sample of 800 students in a university, 160, or 20%, are majors.

A Excellent B Good Correct Answer C Fair D Poor Ans:- B 82 Describe the disadvantages of the case control study A A cohort is different because an entire cohort of exposed individuals is examined. Which index would you use to calculate decay? The traditional black box epidemiology is defined as A. The sum of the percent frequencies for all classes will always equal a. This can be referred to as an Ecological Comparison Study. Is there the concept of 'Number of positives' as well? A Code 4 on the Loss of Attachment Index indicates what? Oral epidemiology is the study of disease and health in populations. Refers to the difference between the incidence rate of a disease in the exposed group and the incidence rate in the non-exposed group.

A True B False Correct Answer Ans:- B 70 An excellent score on the Plaque Index would be what? Which of the following should he use: a. These are a form of intervention studies, two types are randomized controlled trials and quasiexperiments C. Each obse rvatio n is multi plied by 1 0 and the result decreased by 2. A True B False Correct Answer Ans:- B 70 An excellent score on the Plaque Index would be what? Mostly, cannot assign subjects by random to certain study conditions. Correct Answer C The predictive value is the proportion of people screened positive by a test and actually have the disease, this is the + value. Consider the comparision of serum iron levels in healthy children and children suffering from cystic fibrosis.