What level of measurement (nominal, ordinal, interval, ratio) is appropriate for the movie rating system that you see in tv guide?

Do you have to get teased in the police academy?

You've arrived at the pecan shellers conference—your first networking opportunity. naturally, you're feeling nervous, but to avoid seeming insecure or uncertain, you've decided to a. speak a little louder than you would normally. b. talk on your cell phone as you walk around. c. hold an empowered image of yourself in your mind. d. square your shoulders before entering the room.

When cell phones were first entering the market, they were relatively large and reception was undependable. all cell phones were essentially the same. but as the technology developed, many competitors entered, introducing features unique to their phones. today, cell phones are only a small fraction of the size and weight of their predecessors. consumers can buy cell phones with color screens, cameras, internet access, daily planners, or voice activation (and any combination of these features). the history of the cell phone demonstrates what marketing trend?