Answer:
The response to the question is a discrete random variable.
Explanation:
By definition of a discrete random variable we infer that the response can only take certain known values but the response shall be completely random. As an example when we toss a fair coin the out comes are discrete as only either head or tail is possible and the outcome is random meaning we cannot predict the outcome before hand.
Similarly an continuous random variable takes any value in a set and there are infinitely many possible values it can take. For example if we choose any real number between 1 and 10. Since the answers are infinitely many in number and are completely random.
Now in our survey we can infer that the responses shall be either "yes I smoked last week" or "No i didn't smoke last week". Hence the variables are discrete and random.
Answer:
Subsistence agriculture
Explanation:
occurs when farmers grow food crops to meet the needs of themselves and their families on smallholdings. Subsistence agriculturalists target farm output for survival and for mostly local requirements, with little or no surplus. ... Most subsistence farmers today operate in developing countries.
If you wanted an explanation.
Answer:
B. Medicines
Explanation:
Bacteria evolve and helps develop antibodies as well as many other things.
Answer:
parental controls or the air horn
Explanation:
parental controls limit the time children have to be creative(1) and they can restrict which parent can do what to each device if only one of them knows the password(2)
the air horn is an invention that is very loud and annoying(1) and there is no real use for it(2)
