Page 221 - Data Science class 10
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iv.  Quartiles of dataset partitions the data into  ______________________ equal parts.
                     a.  Three                                       b.  Four

                     c.  Two                                         d.  Six

                 v.   What is the value of mean and standard deviation in a standard normal distribution?
                     a.  1 and 0                                     b.  0.5 and 0.5
                     c.  0 and 1                                     d.  1 and 1

                 vi.  If you soft delete a file

                     a.  It gets deleted forever
                     b.  One can easily restore it
                     c.  The hard disk gets formatted

                     d.  A duplicate copy gets generated

            Q. 5.  Answer any 5 out of the given 6 questions                                         (1 × 5 = 5 marks)
                 i.     The scores of five students in a subject are 72, 82, 94, 85, 74. Find the median.

                 ii.     The collection of one or more outcomes from an experiment is called ______________________
                     a.  Probability                                 b.  Distribution

                     c.  Event                                       d.  Random Experiment
                 iii.  Statement1: Probability is a very essential tool in statistics.

                     Statement2: There is no relation between probability and how we make predictions in statistics.
                     a.  Both Statement1 and Statement2 are correct

                     b.  Both Statement1 and Statement2 are incorrect
                     c.  Statement1 is correct but Statement2 is incorrect
                     d.  Statement2 is correct but Statement1 is incorrect

                 iv.  What measures of position divides the distribution into 10 equal parts?
                     a.  Quartiles                                   b.  Deciles

                     c.  Percentiles                                 d.  Range

                 v.     Statement A: A z-score describes the position of a fair score in terms of its distance from the mean when measured
                     in standard deviation units.

                     Statement B: The z-score is positive if the value lies above the mean and negative if it lies below the mean.
                     a.  (A)is false but (B) is true                 b.  (A)is true but (B) is false

                     c.  Both (A) and (B) are true                   d.  Both (A) and (B) are false
                 vi.  Assertion (A) : While storing the data in your device, you can encrypt the it.

                     Reason (R) : In the case of a data leak, hackers are not able to read your data.
                     a.  Both A and R are correct and R is the correct explanation of A
                     b.  Both A and R are correct but R is not the correct explanation of A

                     c.  A is correct and R is incorrect
                     d.  R is correct and A is incorrect


                                                                                 CBSE Sample Question Paper    219
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