TRICHY ENGINEERING COLLEGE
(A Unit of SS Group of Institutions)
Approved by AICTE & Affiliated to Anna University, Chennai
An ISO 9001:2015 Certified Institution
Sivagnanam Nagar, Trichy-Chennai NH, Konalai, Trichy - 621 105.
UNIT III
UNIVARIATE ANALYSIS
1. What does univariate analysis involve?
A) Analyzing data with more than one variable
B) Analyzing data with a single variable
C) Analyzing time-dependent data
D) Analyzing categorical data
Answer: B) Analyzing data with a single variable
2. Which of the following is NOT a measure of central tendency?
A) Mean
B) Median
C) Mode
D) Variance
Answer: D) Variance
3. What does the standard deviation measure in univariate analysis?
A) The average value of a dataset
B) The spread or dispersion of data around the mean
C) The most frequent value in the dataset
D) The difference between the highest and lowest values
Answer: B) The spread or dispersion of data around the mean
4. Which of the following is a graphical representation used in univariate analysis?
A) Scatter plot
B) Pie chart
C) Bar chart
D) Box plot
Answer: D) Box plot
5. In a normal distribution, what percentage of data lies within one standard deviation of the
mean?
A) 50%
B) 68%
C) 95%
D) 99%
Answer: B) 68%
6. Which of the following measures is affected by extreme values (outliers)?
A) Median
TRICHY ENGINEERING COLLEGE
(A Unit of SS Group of Institutions)
Approved by AICTE & Affiliated to Anna University, Chennai
An ISO 9001:2015 Certified Institution
Sivagnanam Nagar, Trichy-Chennai NH, Konalai, Trichy - 621 105.
B) Mode
C) Mean
D) Interquartile range
Answer: C) Mean
7. The interquartile range (IQR) is the difference between which two percentiles?
A) 25th and 75th
B) 10th and 90th
C) 50th and 100th
D) 0th and 100th
Answer: A) 25th and 75th
8. If the skewness of a dataset is negative, what does this imply about the distribution?
A) The distribution is symmetric
B) The distribution is positively skewed
C) The distribution has a longer tail on the left side
D) The distribution has a longer tail on the right side
Answer: C) The distribution has a longer tail on the left side
9. Which of the following is a measure of dispersion?
A) Mean
B) Variance
C) Median
D) Mode
Answer: B) Variance
10. What does kurtosis measure in a dataset?
A) The skewness of the distribution
B) The peakedness or flatness of the distribution
C) The central tendency
D) The range of the dataset
Answer: B) The peakedness or flatness of the distribution
11. Which type of plot is most appropriate to visualize the frequency distribution of a continuous
variable?
A) Pie chart
B) Histogram
C) Line graph
D) Scatter plot
Answer: B) Histogram
TRICHY ENGINEERING COLLEGE
(A Unit of SS Group of Institutions)
Approved by AICTE & Affiliated to Anna University, Chennai
An ISO 9001:2015 Certified Institution
Sivagnanam Nagar, Trichy-Chennai NH, Konalai, Trichy - 621 105.
12. What is the relationship between variance and standard deviation?
A) Standard deviation is the square of variance
B) Variance is the square of standard deviation
C) They are equal
D) Variance is the cube of standard deviation
Answer: B) Variance is the square of standard deviation
13. Which of the following best describes a unimodal distribution?
A) A distribution with one peak
B) A distribution with two peaks
C) A distribution with no peaks
D) A distribution with multiple peaks
Answer: A) A distribution with one peak
14. In univariate analysis, which of the following describes the middle value of an ordered
dataset?
A) Mode
B) Mean
C) Median
D) Range
Answer: C) Median
15. Which of the following measures is used to describe the relative standing of a data point in a
dataset?
A) Z-score
B) Mean
C) Median
D) Interquartile range
Answer: A) Z-score
