Page 145 - Data Science class 11
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8. A study where researchers had 20 test subjects and 10 were randomly assigned to receive a medicine being studied
and the other 10 would receive a placebo. Which type of Analytic Study is this?
a. Observational Study b. Experimental Study
c. Objective Study d. Case Controlled Study
9. For example, purposefully exposing a subject to polluted air to observe the health issues that come to the forefront is
unethical. In this scenario, which is better:
a. Trial assessment b. Observational Study
c. Both a and b d. None of these
10. ______________________ makes use of your five senses, but an ______________________ is a conclusion based on a number of
observations.
a. Inference, Observation b. Observation, Inference
c. Observation, Experiment d. Inference, Experiment
B. Fill in the blanks.
1. ______________________ observations are usually a structured examination that takes place in a psych lab.
2. ______________________ observation is a research methodology used by market researchers to study the behaviours of
participants in a natural environment.
3. An ______________________ is one in which action will be taken on a cause system to enhance the performance of the
system of interest in future.
4. The steps in the process of modelling that must be followed if learning is to be successful are attention, retention,
reproduction and ______________________.
5. Quantitative observations are made via measuring ______________________ like rulers, balances, thermometers etc.
C. State whether these statements are true or false.
1. Forecasts are never 100% accurate. ___________
2. Quantitative forecasting is based on expert or skilful opinions. ___________
3. Forecasting facilitates managerial decisions. ___________
4. Controlled studies are not laborious. ___________
5. In trial assessments, the subject is only observed. ___________
D. Match the following.
A B
1. Qualitative observations a. Cannot be forecasted
2. Time Series model b. Made through senses to observe results.
3. Naturalistic observation c. Involves knowing how the variables interact in terms of hours, weeks, months
or years.
4. Observations study d. Guarantees validity when participants are in their natural setting
5. Forecasting currency exchange rate e. Economical
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