Biostatistics MCQs | BIO401 MCQs | Set 2
Biostatistics MCQs | BIO401 MCQs | Set 2
MCQs (Multiple Choice Questions)
1) One of the earliest known demographic / Bio-statistics study was conducted by:
a) Nightingale
b) John Graunt
c) The Lady with a Lamp
d) Ronald A. Fisher
Correct Answer:
The correct answer is 'b'.
Explanation:
One of the earliest known demographic/biostatistics studies was conducted by John Graunt. He is recognized for his work in demography and is often considered a pioneer in the field. In 1662, Graunt published a landmark book titled "Natural and Political Observations Mentioned in a Following Index and Made upon the Bills of Mortality." This work is regarded as one of the first instances of quantitative analysis of populations and their vital statistics, which laid the foundation for the field of demography and biostatistics.
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2) Sometimes ______ is also called as "quota" random sampling.
a) Stratified sampling
b) Cluster sampling
c) Simple sampling
d) Systematic sampling
Correct Answer:
The correct answer is 'a'.
Explanation:
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3) If the p value is 0.029 using `\alpha` - 0.05 as the level of significance criterion, which of the following will be correct?
b) All given
d) The results are statistically significant
Correct Answer:
The correct answer is 'd'.
Explanation:
In statistical hypothesis testing, a p-value below the chosen level of significance (α)—in this case, 0.05—suggests that there's evidence against the null hypothesis. A p-value of 0.029 is less than 0.05, indicating that the results are considered statistically significant. This implies that there is enough evidence to reject the null hypothesis in favor of the alternative hypothesis..
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4) Commonly used measure of central tendency is/are:
a) All of these
b) Mode
c) Mean
d) Median
Correct Answer:
The correct answer is 'a'.
Explanation:
These three measures—Mode, Mean, and Median—are used to describe the central or typical value in a set of data.
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5) ________ is the art and science of drawing inferences / conclusions about a population of interest.
a) Sample
b) Population
c) Inferential population
d) Statistical interference
Correct Answer:
The correct answer is 'd'.
Explanation:
Statistical inference involves using sample data to make conclusions or predictions about a larger population. It aims to estimate population parameters, test hypotheses, and make decisions or inferences based on the analysis of sample data.
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6) Population is the collection of all possible entities which is described by_______
a) Statistics
b) Numbers
c) Values
d) Parameters
Correct Answer:
The correct answer is 'd'.
Explanation:
The collection of all possible entities, which is described by Parameters in the context of statistics, refers to the population. Parameters are characteristics or measures that describe a population, such as the mean, variance, or other specific aspects, representing the entire group being studied.
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7) The _______ is the difference between the upper quartile and the lower quartile.
a) Mode
b) Median
c) Sample
d) Interquartile range
Correct Answer:
The correct answer is 'd'.
Explanation:
The difference between the upper quartile and the lower quartile in a dataset is known as the Interquartile range (IQR). It represents the range between the 75th percentile (upper quartile) and the 25th percentile (lower quartile) of a dataset. The IQR is a measure used in statistics to describe the spread or dispersion of the middle 50% of the data.
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8) In NCn , N represents:
a) The sampling fraction
b) The number of cases in the sample
c) The number of cases in
the sampling frame
d) The number of combinations
(subsets) of n from N
Correct Answer:
The correct answer is 'd'.
Explanation:
In the expression NCn , N represents The number of combinations (subsets) of n from N. This notation represents the number of ways to choose n elements from a set of N distinct elements without considering the order. It's commonly known as "N choose n" or "combinations."
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9) _______ sampling is commonly known as unsystematic, accidental or opportunistic sampling.
a) Judgmental or deliberate sampling
b) Convenience
c) Quota sampling
d) Snow Ball Sampling
Correct Answer:
The correct answer is 'b'.
Explanation:
The type of sampling commonly known as unsystematic, accidental, or opportunistic sampling is b) Convenience sampling. Convenience sampling involves selecting subjects based on their easy availability or accessibility to the researcher, making it a convenient and easily accessible way to gather data. This method might not represent the entire population accurately due to its non-random nature.
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10) Probability for a continuous random variable to assume any particular value is
a) 1
b) -1
c) 0-1
d) 0
Correct Answer:
The correct answer is 'd'.
Explanation:
For continuous random variables, the probability of any specific or exact value is zero. This is due to the infinitely many possible values that a continuous random variable can take on within a given range. The probability is associated with intervals or ranges rather than individual specific points for continuous variables.
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