Doubt on Not graded assignment. Why this is incorrect, plz explain. attached the screenshot.

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pradeep kumar

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Oct 6, 2020, 4:07:14 AM10/6/20
to Discussion forum for Statistics for Data Science I

pradeep kumar

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Oct 6, 2020, 4:09:22 AM10/6/20
to Discussion forum for Statistics for Data Science I, pradeep kumar
  1.  Temperature is the case; relative humidity and time are the variables
  2.  Temperature is the case; relative humidity is the variable
  3.  Time is the case; temperature and relative humidity are the variables
  4.  Relative humidity is the case; temperature is the variable
  5.  9 AM, 9:30 AM, 10 AM are cases; time, temperature, and relative humidity are variables.
    I chose 3rd option but it shows as incorrect. Plz explain why 5th option is correct.

On Tuesday, October 6, 2020 at 1:37:14 PM UTC+5:30 pradeep kumar wrote:

Nikita Kumari

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Oct 6, 2020, 4:56:43 AM10/6/20
to Discussion forum for Statistics for Data Science I, pradeepma...@gmail.com
Hi Pradeep,

Time is not the case, time is a variable. If you look at the table, time is varying and it takes the values 9:00 A.M., 9:30 A.M., and so on.
After every 30 minutes starting from 9:00 AM, the temperature and relative humidity in a room have been recorded. So, 9:00 AM, 9:30 AM, 10 AM,... are the cases because variables are recorded at these times. 
Hope this clears your doubt. You can also refer to Lec 1.2. 

Thanks and regards
Nikita Kumari
Content Support team
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