Page 316 - AI Ver 3.0 Class 11
P. 316

7.   Which characteristic is shared by both interval and ratio scales, but not by nominal or ordinal scales?
                        a.  Order/Ranking                              b.  Equal Intervals
                        c.  Meaningful Zero Point                      d.  Categorical Data
                   8.   Why is the median considered a better measure of central tendency than the mean in a skewed distribution?

                        a.  It is easier to calculate.                 b.  It is not affected by extreme values.
                        c.  It takes into account all values in the dataset.      d.  It is always a whole number.
                   9.   If a dataset has two modes, then it will be called as     .
                        a.  Unimodal                                   b.  Bimodal
                        c.  Multi-modal                                d.  Any of these

                   10.   What does a line graph represent?
                        a.  Categorical data                           b.  Discrete data
                        c.  Continuous data                            d.  Nominal data
                   11.   What type of data is best represented using a bar chart?

                        a.  Continuous data                            b.  Categorical data
                        c.  Ordinal data                               d.  Nominal data
                   12.   Which metrix is commonly used for evaluating classification problems?
                        a.  Mean Squared Error (MSE)                   b.  Accuracy
                        c.  R-squared                                  d.  Root Mean Squared Error (RMSE)

                   13.   Which technique divides the dataset into two sets: Training and Testing?
                        a.  Train-Test Split                           b.  Cross-Validation
                        c.  Error Analysis                             d.  Feature Selection
                   14.   What is the term used for data points that deviate significantly from most of the dataset i.e. extreme values?

                        a.  Normals                                    b.  Anomalies
                        c.  Variations                                 d.  Outliers
              B.   Fill in the blanks.

                   1.   The main goal of AI data analysis is to extract valuable information that can aid in    and drawing
                        conclusions.

                   2.                  is a specialized tool used in surveys – is a collection of questions meant to gather information
                        from respondents.
                   3.                  use statistical methods and visualisation tools to look for similarity, patterns, and outliers.
                   4.                  divides the dataset into two equal halves, with half of the values being less than the median and
                        half being greater.

                   5.   A               is a strong tool for representing continuous data on a numbered axis.
                   6.                  converts continuous data into discrete categories.

                   7.   The distribution of the           data may be entirely different from the real-world data.
                   8.                  ensures consistent model performance across different data subsets.
              C.   State whether the following statement is True or False.

                   1.   The method used to measure a collection of data is known as the level of measurement.
                   2.   Secondary data is considered valuable because it is tailored to the specific research or  business needs.


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