Two-Way Table
A table that organizes counts for two categorical variables at the same time.
Back to NC Math 3 Home6 Practice Sets Complete
Math 3 Strand
Statistics and Probability
This strand review helps students read data carefully, compare distributions, and make smarter probability decisions on the NC Math 3 EOC.
Focus on two-way tables, conditional probability, independence, expected value, z-scores, normal distributions, standard deviation, and sampling ideas while using Desmos strategically to inspect tables and data displays.
Confidence Check
If you can move through Sets 1 to 6 in order, explain what a distribution is showing instead of guessing from one number, and use calculator tools to support your reasoning, you are building real NC Math 3 EOC readiness.
Objectives Covered
- Interpret two-way tables, conditional probability, and event relationships in realistic NC Math 3 contexts.
- Decide whether events are independent or dependent by comparing probabilities and reading the situation carefully.
- Compare distributions by center, spread, shape, and possible outliers instead of looking at one number only.
- Use expected value, z-scores, normal distribution ideas, and standard deviation to make better decisions.
- Interpret sampling methods and margin of error so survey conclusions feel more trustworthy or more questionable.
- Use Desmos tables, lists, and plots strategically to check data displays and support calculator-active reasoning.
Key Vocabulary
Student-Friendly Terms to Know
These words appear often in class, in data displays, and on statistics and probability EOC questions.
Conditional Probability
The probability of one event happening when you already know another event happened.
Independent Events
Events where knowing one happened does not change the probability of the other.
Dependent Events
Events where one outcome changes the probability of the next outcome.
Expected Value
The long-run average result of a random situation, such as a game or choice.
Normal Distribution
A symmetric, bell-shaped distribution where most values cluster near the mean.
Standard Deviation
A measure of how spread out the data values are from the mean.
Z-Score
A value that tells how many standard deviations a data point is above or below the mean.
Sample
A smaller group selected from a larger population to learn about the population.
Margin of Error
The amount a survey estimate might reasonably differ from the true population value.
Practice Questions
Choose a Statistics and Probability Practice Set
All 6 sets are ready to use. Start with the early skill-builders, then move into mixed and challenge work to build steadier EOC confidence.
Recommended Practice Order
Sets 1 to 6 for Most Students
This order moves from core vocabulary and data reading to mixed review so students can build confidence before the final readiness check.
1
Practice Set 1
Start with core vocabulary and displays.
Review two-way tables, standard deviation, normal distribution basics, and margin of error first.
2
Practice Set 2
Connect the main probability and data ideas.
Use conditional probability, expected value, z-scores, and distribution comparisons in multi-step practice.
3
Practice Set 3
Push into stronger reasoning.
Interpret studies, evaluate claims, and justify which conclusions are supported by the data.
4
Practice Set 4
Practice switching question types.
Move between quick probability checks, distribution questions, and survey reasoning.
5
Practice Set 5
Take on EOC-style challenge items.
Work through higher-demand questions that blend statistics interpretation with probability decisions.
6
Practice Set 6
Finish with a readiness check.
Use a final mixed review to check pacing, accuracy, and overall confidence.
Practice Set 1
DOK 1 Practice Set
Review two-way tables, standard deviation, normal distribution basics, z-scores, and margin of error vocabulary.
Practice Set 2
DOK 2 Practice Set
Connect conditional probability, independence, expected value, z-scores, and distribution comparisons in multi-step practice.
Practice Set 3
DOK 3 Practice Set
Use strategic reasoning to evaluate survey claims, compare distributions, and justify conclusions from data.
Practice Set 4
Mixed Practice A
Blend probability, sampling, expected value, and distribution questions so students practice changing gears smoothly.
Practice Set 5
EOC Challenge Set
Tackle stronger NC Math 3 statistics and probability questions that mix data interpretation with decision-making.
Practice Set 6
Mixed Readiness Check
Finish with a final mixed review focused on conditional probability, distributions, and survey interpretation under pressure.