MCQs

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Overall MCQs for Reference

Which of the following is a measure of central tendency?
a. Range
b. Mean
c. Variance
d. Standard Deviation
Answer: b. Meandev+2
What is the formula for calculating the mean of a dataset?
a. Mode of all values
b. Highest value minus lowest value
c. Sum of values divided by the number of values
d. Number of values multiplied by each value
Answer: c. Sum of values divided by the number of valuesgeeksforgeeks+2
In a dataset: , find the median.wayground+4
a. 6
b. 8
c. 12
d. 15
Answer: b. 8scribbr+2
Which measure is most affected by outliers?
a. Mean
b. Median
c. Mode
d. Range
Answer: a. Meandatacamp+2
For a dataset with repeated values, which measure best indicates the most frequent occurrence?
a. Mean
b. Mode
c. Median
d. Range
Answer: b. Modegeeksforgeeks+2
How is the median calculated for even-numbered datasets?
a. Middle value
b. Largest value
c. Average of the two middle values
d. Smallest value
Answer: c. Average of the two middle valuesdev+2
What is the mode of ?testbook+3
a. 3
b. 4
c. 5
d. 2
Answer: a. 3geeksforgeeks+1
Which measure of central tendency is suitable for categorical data?
a. Mean
b. Median
c. Mode
d. Variance
Answer: c. Modedatacamp+2
In AI, central tendency helps summarize data by:
a. Showing exact values of all points
b. Giving a representative value of the dataset
c. Calculating only the outliers
d. Hiding all data features
Answer: b. Giving a representative value of the datasetdatasource+2
The mean of is:byjus+1
a. 25
b. 30
c. 35
d. 40
Answer: b. 30dev+1
Which measure is least likely to change if an outlier is added?
a. Mean
b. Mode
c. Range
d. Median
Answer: d. Mediantestbook+1
The most common measure used in machine learning for loss calculation is:
a. Mean
b. Standard deviation
c. Range
d. Mode
Answer: a. Meanscribbr+2
How is the median obtained in an ordered dataset of odd length?
a. Mean of all values
b. Mode
c. Value at the center position
d. Highest value
Answer: c. Value at the center positionscribbr+2
In statistical inference, which value is predicted to best represent data?
a. Median
b. Mean
c. Mode
d. Range
Answer: b. Meandatasource+2
What is the mode of ?scribd+4
a. 2
b. 4
c. 6
d. 8
Answer: c. 6geeksforgeeks+1
Which central tendency measure can be bimodal?
a. Mean
b. Median
c. Mode
d. Range
Answer: c. Modedatacamp+2
Median is useful in AI when:
a. Data is evenly distributed
b. There are extreme outliers
c. Data is always categorical
d. Variance is zero
Answer: b. There are extreme outliersdev+2
Which is NOT a central tendency measure?
a. Mean
b. Mode
c. Standard deviation
d. Median
Answer: c. Standard deviationdatacamp+2
If every value in a dataset is the same, the mean, median, and mode are:
a. Different
b. Mean is highest
c. Mean equals median equals mode
d. Mode is lowest
Answer: c. Mean equals median equals modedev+1
The arithmetic mean is most useful when data is:
a. Skewed
b. Normally distributed
c. Categorical
d. Bimodal
Answer: b. Normally distributeddatasource+2
What does AI typically use as a summary statistic for regression outputs?
a. Mean
b. Mode
c. Median
d. None of these
Answer: a. Meanscribbr+1
Which central tendency measure is most robust to outliers?
a. Mean
b. Median
c. Mode
d. Range
Answer: b. Mediantestbook+2
Mode can be used to determine:
a. Average value
b. Frequency of occurrence
c. Center of distribution
d. Spread
Answer: b. Frequency of occurrencedatacamp+1
The measure best suited for income data with high disparity is:
a. Mode
b. Mean
c. Median
d. Range
Answer: c. Medianscribbr+2
What is the mean of ?slideshare+2
a. 5
b. 10
c. 15
d. 30
Answer: b. 10geeksforgeeks+1
Which measure of central tendency must the data be quantitative for?
a. Mode
b. Median
c. Mean
d. Range
Answer: c. Meangeeksforgeeks+2
The median of is:studocu+4youtube
a. 9
b. 10
c. 8.5
d. 10.5
Answer: c. 8.5dev+2
For which data is mode not always useful in AI?
a. Categorical
b. Continuous
c. Discrete
d. Ranked
Answer: b. Continuousscribbr+1
The mean is denoted in population statistics as:
a. σ (sigma)
b. μ (mu)
c. θ (theta)
d. β (beta)
Answer: b. μ (mu)datacamp+1
If dataset: , what is the mode?slideshare
a. 0
b. 1
c. 5
d. None
Answer: c. 5geeksforgeeks+1
When is median preferred over mean?
a. When data is normal
b. With many extreme values
c. When data is categorical
d. When mode is prevalent
Answer: b. With many extreme valuestestbook+1
Which is most appropriate for qualitative AI datasets?
a. Mean
b. Median
c. Mode
d. Range
Answer: c. Modedev+1
If data changes but frequency remains the same, which is unaffected?
a. Mode
b. Mean
c. Median
d. Range
Answer: a. Modescribbr+1
In AI statistics, what summarizes data distribution center?
a. Standard deviation
b. Central tendency
c. Range
d. Variance
Answer: b. Central tendencydatasource+2
Which measure uses all values in its calculation?
a. Mean
b. Mode
c. Median
d. Range
Answer: a. Meandatasource+2
Median must be calculated as:
a. Smallest value
b. Largest value
c. Middle value after ordering
d. Random value
Answer: c. Middle value after orderinggeeksforgeeks+2
The mean of :studocu+3
a. 4
b. 5
c. 8
d. 7
Answer: b. 5dev+1
Which is NOT a property of median?
a. Affected by every value
b. Divides data into two halves
c. Robust to outliers
d. Can be calculated for ordinal data
Answer: a. Affected by every valuedatacamp+1
Mode may have more than one value if:
a. Data is normal
b. Many repeated values
c. All values are unique
d. None repeated
Answer: b. Many repeated valuesdatacamp+1
Mean is best when data is:
a. Skewed
b. Uniform
c. Continuous and symmetric
d. All of these
Answer: c. Continuous and symmetricdev+1
Median is best with which distribution?
a. Bimodal
b. Uniform
c. Skewed
d. Symmetric
Answer: c. Skewedscribbr+2
If data has two modes, it is called:
a. Bimodal
b. Unimodal
c. Trimodal
d. Multimodal
Answer: a. Bimodaldatacamp+1
Mode is most useful for:
a. Continuous data
b. Qualitative data
c. Quantitative data
d. Uniform data
Answer: b. Qualitative datadev+1
If in AI, the mean is 20, median is 18, and mode is 17, distribution is most likely:
a. Symmetric
b. Bimodal
c. Positively skewed
d. Negatively skewed
Answer: c. Positively skeweddatasource+1
The sum of deviations from mean for all data points is:
a. Zero
b. Maximum
c. Minimum
d. Undefined
Answer: a. Zerodatasource+2
Mean is preferred in AI for:
a. Small sample size
b. Large datasets with no outliers
c. Ordinal data
d. Skewed data
Answer: b. Large datasets with no outliersdatasource+2
Median divides data into:
a. Three equal parts
b. Two equal parts
c. Four equal parts
d. Five equal parts
Answer: b. Two equal partsgeeksforgeeks+2
If all numbers in a set increase by 5, mean:
a. Decreases by 5
b. Remains constant
c. Increases by 5
d. Is multiplied by 5
Answer: c. Increases by 5geeksforgeeks+1
The formula for mean is:
a. ∑ x / n
b. ∑ n / x
c. ∑ x × n
d. ∑ x + n
Answer: a. ∑ x / ndatacamp+2
In machine learning, which measure helps identify the center of error distribution?
a. Mean
b. Mode
c. Standard deviation
d. Range
Answer: a. Meandatasource+2

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