# Probability and statistics

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

## Class VII skills

- Y.1 Calculate mean, median, mode and range
- Y.2 Interpret charts to find mean, median, mode and range
- Y.3 Mean, median, mode and range: find the missing number
- Y.4 Changes in mean, median, mode and range
- Z.1 Probability of simple events
- Z.2 Probability of opposite, mutually exclusive and overlapping events
- Z.3 Experimental probability
- Z.4 Make predictions
- Z.5 Compound events: find the number of outcomes
- Z.6 Counting principle

## Class VIII skills

- AA.1 Calculate mean, median, mode and range
- AA.2 Interpret charts to find mean, median, mode and range
- AA.3 Mean, median, mode and range: find the missing number
- AA.4 Changes in mean, median, mode and range
- BB.1 Probability of simple events
- BB.2 Probability of opposite, mutually exclusive and overlapping events
- BB.3 Experimental probability
- BB.4 Make predictions
- BB.5 Compound events: find the number of outcomes
- BB.6 Counting principle

## Class IX skills

- EE.1 Theoretical probability
- EE.2 Experimental probability
- EE.3 Compound events: find the number of outcomes
- EE.4 Identify independent and dependent events
- EE.5 Probability of independent and dependent events
- EE.6 Factorials
- EE.7 Counting principle
- FF.1 Mean, median, mode and range
- FF.2 Quartiles
- FF.3 Identify biased samples
- FF.4 Variance and standard deviation

## Class X skills

- X.1 Theoretical probability
- X.2 Experimental probability
- X.3 Compound events: find the number of outcomes
- X.4 Identify independent and dependent events
- X.5 Probability of independent and dependent events
- X.6 Geometric probability
- X.7 Counting principle
- Y.1 Mean, median, mode and range
- Y.2 Quartiles
- Y.3 Identify biased samples

## Class XI skills

- EE.1 Introduction to probability
- EE.2 Theoretical and experimental probability
- EE.3 Compound events: find the number of outcomes
- EE.4 Calculate probabilities of events
- EE.5 Permutations
- EE.6 Counting principle
- EE.7 Permutation and combination notation
- EE.8 Find probabilities using permutations and combinations
- EE.9 Find probabilities using two-way frequency tables
- EE.10 Identify independent events
- EE.11 Probability of independent and dependent events
- EE.12 Geometric probability
- EE.13 Find conditional probabilities
- EE.14 Independence and conditional probability
- EE.15 Find conditional probabilities using two-way frequency tables
- EE.16 Find probabilities using the addition rule
- EE.17 Find probabilities using the normal distribution
- FF.1 Mean, median, mode and range
- FF.2 Quartiles
- FF.3 Identify biased samples
- FF.4 Mean absolute deviation
- FF.5 Variance and standard deviation

## Class XII skills

- W.1 Introduction to probability
- W.2 Calculate probabilities of events
- W.3 Combinations and permutations
- W.4 Find probabilities using combinations and permutations
- W.5 Find probabilities using two-way frequency tables
- W.6 Identify independent events
- W.7 Find conditional probabilities
- W.8 Independence and conditional probability
- W.9 Find conditional probabilities using two-way frequency tables
- W.10 Find probabilities using the addition rule
- X.1 Identify discrete and continuous random variables
- X.2 Write a discrete probability distribution
- X.3 Graph a discrete probability distribution
- X.4 Expected values of random variables
- X.5 Variance of random variables
- X.6 Standard deviation of random variables
- X.7 Write the probability distribution for a game of chance
- X.8 Expected values for a game of chance
- X.9 Choose the better bet
- X.10 Find probabilities using the binomial distribution
- X.11 Mean, variance and standard deviation of binomial distributions
- X.12 Find probabilities using the normal distribution
- X.13 Find z-values
- X.14 Find values of normal variables
- X.15 Distributions of sample means
- X.16 The Central Limit Theorem
- X.17 Use normal distributions to approximate binomial distributions
- Y.1 Match correlation coefficients to scatter plots
- Y.2 Calculate correlation coefficients
- Y.4 Interpret regression lines
- Y.5 Analyse a regression line of a data set
- Y.6 Analyse a regression line using statistics of a data set