Test on Random Sampling for Population Studies
Random Sampling for Population Studies: Guide for Students
Test: Random Sampling Methods
20 questions
Question 1: When sampling plant species in a field using the grid method, samples are taken at coordinates that are visually selected by the researcher.
A. Ano
B. Ne
Explanation: The study materials state that a random number generator is used to select coordinates for sampling, not visual selection by the researcher.
Question 2: Assigning numbers to individuals in a population is the final step before collecting data from a randomly selected sample group.
A. Ano
B. Ne
Explanation: Assigning numbers to individuals is done after identifying the total population of interest, but before using a random number generator to choose the sample group from those assigned numbers.
Question 3: In an investigation into how many people diagnosed with Type 2 diabetes also have heart disease, health professionals assess all 270,196 identified individuals for heart disease directly.
A. Ano
B. Ne
Explanation: It is not practical or possible to study an entire human population directly. Instead, a random number generator is used to select a sample group from the identified individuals, and the proportion of heart disease in this sample is used to estimate the total number in the population.
Question 4: The proportion of individuals exhibiting a certain characteristic within a randomly selected sample can be used to estimate the total number of individuals with that characteristic in the overall population.
A. Ano
B. Ne
Explanation: The study materials explain that the proportion of people in a sample who have a certain condition can be used to estimate the total number of people in the wider population with that same condition.
Question 5: In a study investigating the proportion of people with Type 2 diabetes who also have heart disease, individuals diagnosed with Type 2 diabetes can be identified using hospital records.
A. Ano
B. Ne
Explanation: The study materials state that when investigating how many people diagnosed with Type 2 diabetes also have heart disease, 'All the people who have been diagnosed with Type 2 diabetes in the country of interest are identified by hospital records'.