Biostatistics MCQs

Classifications of dental disease is an example of what:

Patients may alter their behavior when they know they are being observed under study conditions. Which of the following terms best describes this phenomenon?

A study is conducted to compare the efficacy of two medications (Drug A and Drug B) for the treatment of hypertension. One hundred patients are enrolled in the study (50 receiving Drug A and 50 receiving Drug B). Which of the following terms BEST describes patients receiving the study medications?

A study was conducted to evaluate an antibiotic in the treatment of possible bacteremia. Five hundred children with fever but no focal infection were randomly assigned to the antibiotic or to a placebo. All patients were re-evaluated after 48 hours. The design used in this study is best described as a:

The most effective method of controlling extraneous variables is by:

Graph to correlate two quantitative data is:

Which one of the following is used for global alignment of two protein sequences?

A researcher samples n individuals randomly from a population of blackbuck and identifies their sex. The number of females in the sample follows:

The correlation between the observed and predicted values of the outcome variable is known as:

The square root of the variance is known as:

Best way to plot the change of incidence of disease over time is called:

A popular method of presenting data to the man in the street and those who cannot understand orthodox charts is?

The appropriate statistical test to find out if obesity is a significant risk factor for breast cancer is?

The test used to compare two qualitative data is?

A study to compare the hemoglobin level was conducted on alcoholics before and after consumption. The statistical method used to find significance Is?

p-value is defined as:

In 95% confidence interval, the level of significance (α):

A Type 1 statistical error is said to have occurred if:

A study had a normal distribution with a median value of 200 and a standard deviation of 20. 68% will fall between:

In a study, the following interpretations are obtained: Satisfied, very satisfied, dissatisfied. Which type of scale is this?

What is the purpose of stratified sampling?

Which measure of variability is most affected by extreme outliers?

Which type of study design is used to investigate the causes of diseases?

Which measure of central tendency is most affected by extreme outliers?

Which of the following is not a key objective of biostatistics?