Page 150 - Data Science class 11
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C. State whether these statements are true or false.
1. Forecasting cannot be dangerous. ___________
2. The Delphi method is often used to predict trends based on the information given by the think tank. ___________
3. One of the sub-categories of Consumer Survey method is Complete Enumeration Survey. ___________
4. Forecasters take regression and input-output analysis for consideration for forecasting. ___________
5. Inference is based on only one observation. ___________
Standard Questions (Section B)
A. Short answer type questions:
1. What is forecasting? Give two examples of forecasting.
2. What is the need for forecasting in any business or organisation?
3. List the names of the four main types of forecasting methods that financial analysts are likely to use.
4. List the names of more popular data collection methods.
5. What are the pros and cons of using the observational study method?
6. Write short notes on any two of following:
a. Biased opinion
b. The possibility of using more than one control group
c. Retrospective Observational study
B. Long answer type questions:
1. Enumerate the various advantages of forecasting.
2. Describe the various disadvantages of forecasting.
3. Why are Observational studies conducted and in which cases?
4. State the reasons why sometimes observational studies are preferred over trial assessment?
5. What is the difference between Observational studies and Experiments?
6. Using observational data is best in what types of situations?
7. Distinguish between direct and indirect observation methods.
8 Describe three different types of methodologies practised in observational research.
9. Discuss in detail the main disadvantages of observational studies.
Higher Order Thinking Skills (HOTS)
Please answer the questions below in no less than 200 words.
1. A monthly family budget is a forecast of income and expenditure of a family in a month. Critically discuss the above
statement.
2. Imagine that you have been given the task to observe the food seeking behaviour of rats. Would it be best to conduct
this in the wild, or in a laboratory situation? Do you think the results will matter?
3. Discuss among all possible number of students whether the study achieved its target. In an observational study and
outcome of patients with COVID-19 in Mumbai City was conducted. Setting Data extraction from medical records of
patients with COVID-19 admitted to Nair Hospital & TN Medical College, Mumbai, India.
The objective of the study was to understand the outcomes of hospitalised patients from Mumbai City, which had the
highest number of COVID-19 cases in India.
Participants 689 patients with COVID-19 were admitted in the hospital from 26 March 2020 to 11 May 2020.
148 Touchpad Data Science-XI

