Secondary Mathematics Flashcards
6 cards from real OSAT practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 Secondary Mathematics flashcards as text
A data set has values: 4, 7, 7, 9, 11, 13. What is the median?
Answer: 8
With 6 values, the median is the average of the 3rd and 4th values: (7 + 9) / 2 = 8.
A bag contains 4 red, 3 blue, and 5 green marbles. What is the probability of drawing a blue marble?
Answer: 1/4
Probability = 3 / (4 + 3 + 5) = 3/12 = 1/4.
Which measure of central tendency is most affected by extreme values (outliers)?
Answer: Mean
The mean is most affected by outliers because every value in the data set contributes to its calculation.
In a normal distribution, approximately what percentage of data falls within one standard deviation of the mean?
Answer: 68%
The empirical rule states that approximately 68% of data falls within one standard deviation of the mean.
A scatter plot shows that as one variable increases, the other also increases. What type of correlation is this?
Answer: Positive correlation
When both variables increase together, they exhibit a positive correlation.
What does the interquartile range (IQR) measure?
Answer: The spread of the middle 50% of the data
The IQR = Q3 − Q1 and represents the spread of the middle 50% of a data set.
How this page was made: written with AI tools and published by Nathan Beja, founder of Practice Test Geeks, who is responsible for its content. Exam facts are checked against the official sources listed below. Not reviewed by a subject-matter expert. Editorial policy
Sources & references
Exam facts on this page (fees, format, dates, passing scores) are checked against these official sources; the date is our last check. Editorial policy
- ceoe.nesinc.com — Retake policy, test delivery, exam format, test dates, score validity, fees, passing score, score release · verified Oct 2026