Random sampling is preferred because it is a group of randomly selected participants which increases generalizabity because it is not biased.
Explanation,
Random sampling is sampling method in which all members have an equal and independent chance of being selected.Each member of a subset has has an an equal opportunity of being chosen as part of the sampling process.An example of Random sampling is total number of employees in an organisations is 400,to conduct a survey you sample 40 employees.Each employee has an equal chance of being selected because all employees which were chosen to part of survey were randomly selected.It is easier to assemble the sample and its has a fair way of collecting a sample.
1 hr on problems bc he's able to finish 40 problems which is better than reading for 1 hr since the teacher said reading for 1 hr is equivalent to solving 35 problems. in the 2nd, 3rd and 4th hours he solves less than 35 problems each hour so it's better to just read for an hour.
401 (K) plans are mainly sponsored plans for employers it defined contribution retirement plans. public education and entities are exempted from taxation.
401 (K) plan provides the option for the employer to match the employee contribution.
401 (K) plan is the easiest way for an employee to contribute a portion of his paychecks savings.
