Test on Introduction to Statistical Fundamentals
Introduction to Statistical Fundamentals: A Student Guide
Test: Statistics
20 questions
Question 1: A random variable is defined as a characteristic whose value is predetermined and does not depend on chance.
A. Ano
B. Ne
Explanation: A random variable is a characteristic that varies by chance, and its value depends on chance.
Question 2: Does simple random sampling ensure that every unit in the population has an equal chance of being selected?
A. Ano
B. Ne
Explanation: The study materials state that under 'Probability Sampling', which includes 'Simple Random' as a 'Method', 'Every unit has equal Chance'.
Question 3: Statistics is the science of collecting, organizing, and understanding data to make better decisions.
A. Ano
B. Ne
Explanation: Statistics is defined as the science of Collecting, Organizing and understanding data to make better decisions.
Question 4: A hypothesis test is used to determine the exact average height of all students in a school.
A. Ano
B. Ne
Explanation: Hypothesis testing helps decide if a result is real or just happened by chance, such as determining if a new medicine worked or was luck. It does not determine exact population values like the average height of all students; that is typically a goal for descriptive statistics or parameter estimation.
Question 5: Systematic sampling is a method where the population is split into groups, and then a random sample is taken from each of these groups.
A. Ano
B. Ne
Explanation: Systematic sampling is defined as picking every kth item after a random start, as shown in the example of randomly starting at #1 and then selecting every 20th person. Splitting the population into groups and then sampling from each is a different sampling approach mentioned, but not defined as systematic sampling.