Point 13 — Research methodology
Causes, generalises, largest population, margin of error.
Cause and effect: sample survey — no; experiment — yes, provided a control/comparison group and random allocation are used.
Largest population to which we can generalise: look for the word “random”, mark the characteristics of the sampled group, and the option with the same characteristics is the answer.
Margin of error: inversely related to sample size, directly related to standard deviation.
Question 1 of 3
A district school board in a certain state is proposing a change to the length of lunch periods for all high schools in the district. A sample of 365 high school students was selected at random from all high school students in the district. The selected students were asked whether they approved of the proposed change, and 211 students responded that they did not approve. Which of the following is the largest population to which the results of the survey can be generalized?