Likert data is interval data as Likert data has no absolute zero so it cannot be ratio data. See the following site: http://graphpad.com/support/faqid/1089/
I confused every time on these categories of scale
Ordinal scale are ranking data and can be arrange in some order eg Ordering on the basis of higher Position to lower. Students in differnent courses, say UG PG M.Phil Ph.D is following a pattern from lower to higher. Is that Ordinal?
Poor Average Good Very Good -supposed i measured on 4 point rating scale? Is that interval or Ordinal? Let make it on 5 point rating scale with level of satisfaction 1-5. Is it interval.
Ratio data almost confuses me when class interval differs like (1-3, 4-9, 10-15) as i classified the experiences or ages on the basis of available frequency .
I If anyone can diffrentiate between Ordinal, Interval and Ratio data with 2-3 examples with reference will be applauded too. Thank you