$21.$ Computers and their effects on student's achievement. The dependent variable isa$)$ Student's achievement b$)$No dependent variablec$)$ Computersd$)$ all the above$22.$ Interviews can help you to better interpret the results of a qualitative investigationa$)$ Trueb$)$ False$23.$ Evaluate the following question on suitability for the use in a questionnaire: $"$Do you think that in the current economical situation it is wise to reduce salaries of top sportsman"$a$)$ This question is leading.b$)$ This question is loaded.c$)$ This question is double$-$barreled.d$)$ This question in any case is not leading, loaded or double$-$barreled$\mathrm{.}24.$ Providing inaccurate information regarding the sources, making it possible to find them is a form of plagiarisma$)$Trueb$)$ False$25.$ What is wrong with a problem definition that is 'biased!$\text{'}$a$)$ The research problem is too broad.b$)$ The problem is not specific and clear.c$)$ The problem definition reflects the opinion of the researcher.d$)$ The problem definition lacks focus