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Drexel University INFO 103 HW2 Spring 2019-20

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INFO 103 – Spring 2019-20 – HW #2 Name: Teerth Patel Student ID: 14404189 Assigned: 04/20/20 Due: 05/8/20 Instructions: Please respond using complete sentences. 1. (10 pts) Describe differences between surveyed, se ...

INFO 103 – Spring 2019-20 – HW #2 Name: Teerth Patel Student ID: 14404189 Assigned: 04/20/20 Due: 05/8/20 Instructions: Please respond using complete sentences. 1. (10 pts) Describe differences between surveyed, sensed, and sampled data (use examples, indicating if they fit into multiple categories). 9 2. (5 pts) Provide an example of sensed data that approaches ethical boundaries and discuss why. 9 3. (5 pts) What is an API in the context of data distribution and collection? 9 4. (5 pts) What does it mean to scrape data? Provide an example. 9 5. (5 pts) Describe some reasons why open-access data might be beneficial to society. 9 6. (2pts) True or False: It is always good for data to be open access. 9 7. (5 pts) Provide three different ways (using examples) in which data can be “dirty.” 9 8. (5 pts) Describe an example data preparation task that does not involve cleaning. 9 9. (5 pts) What is a random seed, and how do they allow for sampling reproducibility? 9 10. (2 pts) True or false: Optical storage devices hold most of the worlds data. 9 11. (2 pts) True or false: More data is being produced than there is room to store it. 9 12. (5 pts) Describe three reasons why cloud-based storage systems are advantageous. 9 13. (2 pts) True or false: A file’s extension necessarily determines its data’s format.9 14. (5 pts) In a 2D ordered array, is it better to represent independent records as rows or columns and Why? 9 15. (5 pts) Describe an example of data (you can make one up) for which an associative array structure is more convenient than an ordered array structure. 9 16. (2 pts) Highlight the appropriate acronym to complete the sentence: 9 17. (5 pts) Describe (with examples) the difference between commonality and centrality. 9 18. (5 pts) What is a quantile? Describe how a quantile and quartile are related. The quantile is defined as the points in a distribution that is mainly related to the rank of the order of values in the distribution. The quantile and quartile are related to each other: Four quartile is equal to one quantile. 19. (20 pts) 9

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