# 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 preview the skill. 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

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

## Seventh-grade skills

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

## Eighth-grade skills

- DD.1 Calculate mean, median, mode, and range
- DD.2 Interpret charts to find mean, median, mode, and range
- DD.3 Mean, median, mode, and range: find the missing number
- DD.4 Changes in mean, median, mode, and range
- DD.5 Quartiles
- DD.6 Identify an outlier
- DD.7 Identify an outlier and describe the effect of removing it
- DD.8 Outliers in scatter plots
- DD.9 Scatter plots: line of best fit
- DD.10 Identify representative, random, and biased samples
- EE.1 Probability of simple events
- EE.2 Probability of opposite, mutually exclusive, and overlapping events
- EE.3 Experimental probability
- EE.4 Make predictions
- EE.5 Compound events: find the number of outcomes
- EE.6 Identify independent and dependent events
- EE.7 Probability of independent and dependent events
- EE.8 Factorials
- EE.9 Permutations
- EE.10 Counting principle
- EE.11 Combination and permutation notation

## Algebra 1 skills

- JJ.1 Theoretical probability
- JJ.2 Experimental probability
- JJ.3 Compound events: find the number of outcomes
- JJ.4 Identify independent and dependent events
- JJ.5 Probability of independent and dependent events
- JJ.6 Permutations
- JJ.7 Counting principle
- JJ.8 Permutation and combination notation
- KK.1 Identify biased samples
- KK.2 Mean, median, mode, and range
- KK.3 Quartiles
- KK.4 Identify an outlier
- KK.5 Identify an outlier and describe the effect of removing it
- KK.6 Mean absolute deviation
- KK.7 Variance and standard deviation
- KK.9 Outliers in scatter plots
- KK.10 Match correlation coefficients to scatter plots
- KK.11 Calculate correlation coefficients
- KK.13 Find the equation of a regression line
- KK.14 Interpret regression lines
- KK.15 Analyze a regression line of a data set

## Algebra 2 skills

- CC.1 Introduction to probability
- CC.2 Calculate probabilities of events
- CC.3 Counting principle
- CC.4 Combinations and permutations
- CC.5 Find probabilities using combinations and permutations
- CC.6 Find probabilities using two-way frequency tables
- CC.7 Identify independent events
- CC.8 Probability of independent and dependent events
- CC.9 Find conditional probabilities
- CC.10 Independence and conditional probability
- CC.11 Find conditional probabilities using two-way frequency tables
- CC.12 Find probabilities using the addition rule
- DD.1 Identify discrete and continuous random variables
- DD.2 Write a discrete probability distribution
- DD.3 Graph a discrete probability distribution
- DD.4 Expected values of random variables
- DD.5 Variance of random variables
- DD.6 Standard deviation of random variables
- DD.7 Write the probability distribution for a game of chance
- DD.8 Expected values for a game of chance
- DD.9 Choose the better bet
- DD.10 Find probabilities using the binomial distribution
- DD.11 Find probabilities using the normal distribution I
- DD.12 Find probabilities using the normal distribution II
- DD.13 Find z-values
- DD.14 Distributions of sample means
- EE.1 Identify biased samples
- EE.2 Variance and standard deviation
- EE.3 Identify an outlier
- EE.4 Identify an outlier and describe the effect of removing it
- EE.5 Outliers in scatter plots
- EE.6 Find the equation of a regression line
- EE.7 Interpret regression lines
- EE.8 Analyze a regression line of a data set
- EE.9 Find confidence intervals for population means
- EE.10 Find confidence intervals for population proportions
- EE.11 Interpret confidence intervals for population means
- EE.12 Experiment design
- EE.13 Analyze the results of an experiment using simulations

## Precalculus skills

- X.1 Introduction to probability
- X.2 Calculate probabilities of events
- X.3 Combinations and permutations
- X.4 Find probabilities using combinations and permutations
- X.5 Find probabilities using two-way frequency tables
- X.6 Identify independent events
- X.7 Find conditional probabilities
- X.8 Independence and conditional probability
- X.9 Find conditional probabilities using two-way frequency tables
- X.10 Find probabilities using the addition rule
- Y.1 Identify discrete and continuous random variables
- Y.2 Write a discrete probability distribution
- Y.3 Graph a discrete probability distribution
- Y.4 Expected values of random variables
- Y.5 Variance of random variables
- Y.6 Standard deviation of random variables
- Y.7 Write the probability distribution for a game of chance
- Y.8 Expected values for a game of chance
- Y.9 Choose the better bet
- Y.10 Find probabilities using the binomial distribution
- Y.11 Mean, variance, and standard deviation of binomial distributions
- Y.12 Find probabilities using the normal distribution
- Y.13 Find z-values
- Y.14 Find values of normal variables
- Y.15 Distributions of sample means
- Y.16 The Central Limit Theorem
- Y.17 Use normal distributions to approximate binomial distributions
- Z.1 Identify biased samples
- Z.2 Variance and standard deviation
- Z.3 Identify an outlier
- Z.4 Identify an outlier and describe the effect of removing it
- Z.5 Outliers in scatter plots
- Z.6 Match correlation coefficients to scatter plots
- Z.7 Calculate correlation coefficients
- Z.8 Find the equation of a regression line
- Z.9 Interpret regression lines
- Z.10 Analyze a regression line of a data set
- Z.11 Analyze a regression line using statistics of a data set
- Z.12 Find confidence intervals for population means
- Z.13 Find confidence intervals for population proportions
- Z.14 Interpret confidence intervals for population means
- Z.15 Experiment design
- Z.16 Analyze the results of an experiment using simulations