Answer: Random sampling
Step-by-step explanation:
- A random sampling technique is a method of sampling in which each member for the sample is chosen randomly from the population.
- Systematic sampling : It is a kind of random sampling in which the members get selected after a fixed interval but a random starting point.
- Convenience sampling : It is a kind of random sampling in which the members get selected on the basis of researchers convenience.
- Stratified sampling : It is a kind of random sampling in which the entire population is divided into a finite number of strata , the researcher select members for sample from each strata.
- Cluster sampling : It is a kind of random sampling in which the entire population is divided into clusters. Then a random sample of cluster is drawn by researcher.
In the given situation , 784 adults are selected after their telephone numbers were randomly generated by a computer.
Therefore , the type of sampling used here is : random sampling
To get a number to decrease by 21% you multiply it by 0.79 (1-0.21)
r = 0.79
55-24=31
31/55=56%
55 > 31 so decreased
Percent of change is decrease 56%
Answer:
8m + 3
Step-by-step explanation:
2m + 3(2m + 1) =
2m + 6m + 3 =
8m + 3
