Directions (Q. Nos. 98 to 100) : A randomized experiment was done for a year by randomly assigning each participant either to walk for half an hour three times a week or to sit quietly reading a book for half an hour three times a week. The participants’ blood pressure was measured over the year. At the end of the year the change was compared for the two groups.
This is a randomized experiment rather than an observational study because :
The participants were randomly assigned to either walk or read, rather than choosing their own activity
What makes a study an experiment is that the researcher imposes the treatment; in a randomized experiment the treatment each participant receives is decided by chance, whereas in an observational study people choose (or already have) their own behaviour and the researcher only records it.
Here each participant was randomly assigned to walk or to read, so the researcher, not the participant, decided the activity; this random assignment is exactly what makes the study a randomized experiment.
Measuring blood pressure at the start and end, or comparing groups at the end, happens in observational studies too; a random sample affects how far results generalise to a population, but it does not make the study an experiment.
Hence, The participants were randomly assigned to either walk or read, rather than choosing their own activity.
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Important Questions from Mixed Topic (MH-SET)
.................... is a client server application that identifies each host on the internet with a unique user-friendly name.
Every OS has a ................ or .......... which primarily resides in the main memory of the computer to perform some of the basic functions of the OS.
(i) Kernel
(ii) Interface
(iii) Nucleus
(iv) Compiler
Codes:
Which of the following are referred to as low level language?
(i) Machine language
(ii) Assembly language
(iii) High level language
(iv) Natural language
Codes:
Match the following:
List I List II (a) New York Public Library (i) Shelv AR (b) Miami University Augmented Research Group (ii) Smart library (c) Oula University Library (iii) Wolf Walk (d) North Carolina State University (iv) Find the future Codes:
Which part of the QR code represents the encoded data?
