STRAIGHTERLINE INTRODUCTION TO STATISTICS ADVANCED QUESTIONS WITH VERIFIED ANSWERS

STRAIGHTERLINE INTRODUCTION TO
STATISTICS ADVANCED QUESTIONS
WITH VERIFIED ANSWERS




1. Which of the following describes a set of data collected from the entire population?

A. Statistic


B. Parameter


C. Sample


D. Variable


Answer: B


Conceptual Explanation: A parameter is a numerical characteristic or measure that

describes a population, whereas a statistic describes a sample.


2. What type of data is represented by eye color (e.g., blue, brown, green)?

A. Continuous


B. Nominal


C. Ordinal

,D. Ratio


Answer: B


Conceptual Explanation: Nominal data consists of categories that cannot be ordered or

ranked in a logical sequence.


3. In a skewed distribution where the mean is greater than the median, the distribution is:

A. Positively skewed


B. Negatively skewed


C. Symmetric


D. Bimodal


Answer: A


Conceptual Explanation: In a positively skewed distribution, the extreme values pull the

mean upward, making it greater than the median.


4. Which measure of central tendency is most affected by extreme outliers?

A. Mean


B. Median


C. Mode


D. Interquartile range


Answer: A

, Conceptual Explanation: The mean incorporates every value in the dataset, making it

heavily influenced by unusually high or low outliers.


5. If the variance of a dataset is 25, what is the standard deviation?

A. 625


B. 50


C. 2.5


D. 5


Answer: D


Conceptual Explanation: The standard deviation is the square root of the variance. The

square root of 25 is 5.


6. What probability value indicates that an event is impossible?

A. 0.5


B. 1


C. -1


D. 0


Answer: D


Conceptual Explanation: Probabilities range from 0 to 1. A probability of 0 means the

event will never occur.