Signals are digitized during transmissions over wireless networks. The chart lists possible features of digital communication. 1. Digital signals carry less information per second.

2. Information can be stored for future recovery.

3. Digital signals can be transmitted over long distances.

4. Signal loss happens less frequently.

Which features are correct?

О 1 and 2 only

O 3 and 4 only

O 1, 2, and 3

O 2, 3, and 4

The correct features are;

2, 3, and 4

Step-by-step explanation:

2) Information carried by digital communication can be stored as digital information on electronic media such that they can be accessed with the aid of electronics and can be stored in a wide variety of recording formats including magnetic and optical media

3) Digital communication can be made over very long distance using serial communication. Fiber optics cables are used for transmitting information across continents using square waves which is a digital signal

4) Digital signals are less likely to be subjected to interference, distortion, and generation loss which is prone to analog signals, and therefore, there is less chance of signal loss when using digital communication.

The survey would be random because some students might not show up, and the lunch made that day might not have been to everyones liking whereas other lunches might be liked by more people.
 
I'd say the sample is random