MCQ Bank

Skewness is a statistical measure that describes the departure of a distribution from symmetry. A symmetric distribution has little or no skewness, while asymmetric distributions show positive or negative skewness.

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Q11

The Mean and Median are Special cases of a family of parameters known as

A) Location parameters
B) None of these
C) Specific parameters
D) Local parameters

AI Explanation

The mean and median are measures that describe the central or positional location of observations in a distribution. They are therefore special cases of location parameters.

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Q12

The Mean and Median are Special cases of a family of parameters known as __________

A) Local parameters
B) Non-local parameters
C) Risk parameters
D) Mobile parameters

AI Explanation

The mean and median are commonly classified as location parameters because they indicate the central position of a distribution. Among the given options, “Local parameters” is the intended answer.

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Q13

The range of a list is ____________ if and only if all the data-points in the list are _______________:

A) 0, unequal
B) 1, unequal
C) 0, equal
D) 1, equal

AI Explanation

The range is calculated as the maximum value minus the minimum value. Therefore, the range is zero exactly when all data points have the same value.

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Q14

Skewness can be of ________ types:

A) 4
B) 1
C) 2
D) 3

AI Explanation

Skewness is commonly classified into three types: symmetric or zero skewness, positive skewness, and negative skewness. These describe the direction and degree of asymmetry in a distribution.

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Q15

in the special rule of multiplication of probability, the events must be:

A) Non exclusive
B) Mutually exclusive
C) Independent
D) Empirical

AI Explanation

The special multiplication rule for probability applies when events are independent. For independent events, the probability of both occurring is the product of their individual probabilities.

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Q16

The special rule of multiplication of probability, the events must be:

A) Empirical
B) Independent
C) Bayesian
D) Mutually exclusive

AI Explanation

The special multiplication rule requires independent events. In this case, the occurrence of one event does not affect the probability of the other.

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Q17

_______ estimates relationship between more than two variables.

A) Basic correlation
B) Multiple correlation
C) Basic regression
D) Binary correlation

AI Explanation

Multiple correlation measures the relationship between one variable and two or more other variables considered together. It extends the idea of simple correlation to multiple predictors or variables.

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Q18

Simple Correlation coefficient (r) is also called as _________

A) Kumar's correlation coefficient
B) Taimura's correlation coefficient
C) Monto's correlation coefficient
D) Pearson's correlation coefficient

AI Explanation

The simple correlation coefficient, commonly represented by r, is known as Pearson's correlation coefficient. It measures the strength and direction of a linear relationship between two variables.

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Q19

For large “p” and small “n”, the binomial distribution will be:

A) Right skewed
B) Non-symmetric
C) Left skewed
D) Symmetric

AI Explanation

When the probability of success p is large and the number of trials n is relatively small, a binomial distribution tends to be negatively or left skewed. Most outcomes cluster near the upper end, producing a longer tail toward lower values.

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Q20

A statistical technique used to determine the degree to which two variables are related is called

A) Correlation
B) None of these
C) Frequency
D) Relationship

AI Explanation

Correlation is the statistical technique specifically used to measure the strength and direction of the relationship between two variables.

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Q21

The _____________________ of A given B is equal to the probability of divided by the probability of B, provided the probability of B is not zero:

A) Marginal probability
B) Binomial distribution
C) Distribution
D) Conditional probability

AI Explanation

Conditional probability of A given B is defined as P(A|B) = P(A∩B)/P(B), provided P(B) is not zero.

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Q22

In kurtosis, numerical measures are made by:

A) Mode
B) Skewness
C) Median
D) All

AI Explanation

In kurtosis, numerical measures are made by comparing with skewness and other moments, but the correct standard formulation involves moments; however, among the options, skewness is the related measure often used alongside kurtosis to describe distribution shape.

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Q23

If a population is collection of all the elements of interest, than a______ is a subset of the population.

A) Individuals
B) Sample
C) None of these
D) People

AI Explanation

A sample is a subset of a population that is selected for study, representing the larger group of interest.

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__________ is used in laboratories to measure beta or alpha radiations.

A) PEM
B) None of these
C) Proportional Counter
D) Ionization Chambers

AI Explanation

A proportional counter is a type of gaseous ionization detector widely used in laboratories to measure and distinguish between alpha and beta radiations based on the gas amplification principle.

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Unlike alpha and beta particles, _________ do not interact with electrons or cause ionization directly.

A) Positron
B) Proton
C) Neutron
D) Gamma particles

AI Explanation

Neutrons are neutral subatomic particles lacking an electric charge, meaning they do not directly interact with atomic electrons or cause primary ionization like charged alpha, beta, or gamma particles.

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Sharks are the most electrically sensitive animals known, responding to DC fields as low as __________nV/cm.

A) 20
B) 5
C) 10
D) 15

AI Explanation

Sharks possess specialized electroreceptor organs called the ampullae of Lorenzini, making them extremely sensitive animals capable of detecting direct current (DC) electric fields as low as 5 nV/cm.

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________is the use of sound waves and echoes to determine where objects are in space.

A) Echolocation
B) Frequency
C) Sound
D) Light

AI Explanation

Echolocation is the biological or technical use of emitted sound waves and returning echoes to locate, range, and identify objects in space.

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In almost all practical electro-dialysis processes, multiple electro-dialysis cells are arranged into a configuration called an____________, with alternating anion and cation exchange membranes forming the multiple electro-dialysis cells.

A) Electro-dialysis stack
B) Electro-dialysis flame
C) Electro-dialysis ground
D) Electro-dialysis Disc

AI Explanation

In practical electrodialysis systems, multiple cells are assembled in series using alternating anion and cation exchange membranes to form a modular unit known as an electro-dialysis stack.

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________ is widely used for medical diagnosis and therapy.

A) DNA Test
B) Radiation
C) RNA test
D) Fermentation

AI Explanation

Various forms of radiation, including X-rays, gamma rays, and radioactive tracers, are widely and routinely utilized in modern medicine for both diagnostic imaging and targeted therapy.