# Probability and statistics

Here is a list of all of the skills that cover probability and statistics! These skills are organized by grade, and you can move your mouse over any skill name to view a sample question. To start practicing, just click on any link. IXL will track your score, and the questions will automatically increase in difficulty as you improve!

## Sixth-grade skills

- S.1Calculate mean, median, mode, and range
- S.2Interpret charts to find mean, median, mode, and range
- S.3Mean, median, mode, and range: find the missing number
- S.4Identify representative, random, and biased samples
- BB.1Combinations
- BB.2Probability of one event
- BB.3Make predictions
- BB.4Probability of opposite, mutually exclusive, and overlapping events
- BB.5Compound events - find the number of outcomes by counting
- BB.6Identify dependent and independent events
- BB.7Probability of dependent and independent events
- BB.8Factorials
- BB.9Permutations

## Seventh-grade skills

- Z.1Probability of simple events
- Z.2Probability of opposite, mutually exclusive, and overlapping events
- Z.3Experimental probability
- Z.4Make predictions
- Z.5Compound events: find the number of outcomes
- Z.6Identify independent and dependent events
- Z.7Probability of independent and dependent events
- Z.8Factorials
- Z.9Permutations
- Z.10Counting principle
- Z.11Combination and permutation notation
- AA.1Calculate mean, median, mode, and range
- AA.2Interpret charts to find mean, median, mode, and range
- AA.3Mean, median, mode, and range: find the missing number
- AA.4Changes in mean, median, mode, and range
- AA.5Identify representative, random, and biased samples

## Eighth-grade skills

- BB.1Probability of simple events
- BB.2Probability of opposite, mutually exclusive, and overlapping events
- BB.3Experimental probability
- BB.4Make predictions
- BB.5Compound events: find the number of outcomes
- BB.6Identify independent and dependent events
- BB.7Probability of independent and dependent events
- BB.8Factorials
- BB.9Permutations
- BB.10Counting principle
- BB.11Combination and permutation notation
- CC.1Calculate mean, median, mode, and range
- CC.2Interpret charts to find mean, median, mode, and range
- CC.3Mean, median, mode, and range: find the missing number
- CC.4Changes in mean, median, mode, and range
- CC.5Quartiles
- CC.6Identify representative, random, and biased samples

## Algebra 1 skills

- JJ.1Theoretical probability
- JJ.2Experimental probability
- JJ.3Compound events: find the number of outcomes
- JJ.4Identify independent and dependent events
- JJ.5Probability of independent and dependent events
- JJ.6Permutations
- JJ.7Counting principle
- JJ.8Permutation and combination notation
- KK.1Mean, median, mode, and range
- KK.2Quartiles
- KK.3Identifying biased samples
- KK.4Mean absolute deviation
- KK.5Variance and standard deviation