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What's on the worksheet
- A climbing gym's made-up records model X, the number of visits a randomly chosen member makes in a week:
- An electric cooperative models X, the number of outages on a rural line in a randomly chosen month (made-up model):
- A delivery driver's route crosses three traffic lights, A, B and C, which work independently.
- At a school fair, a duck pond holds 50 rubber ducks.
- A robot vacuum sometimes gets stuck under furniture.
- A film club plans one summer screening and must book it now.
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The free lesson teaches it with worked examples and practice problems.
Expected value: the lesson ›More Chapter 4 worksheets: Probability and random variables
- 4.1The general addition rule
- 4.2Finding a conditional probability
- 4.3The general multiplication rule
- 4.4Running a simulation and estimating a probability
- 4.5Density curves: area, mean and median
- 4.6The standard normal distribution
- 4.7Normal calculations: areas and percentiles
- 4.8Random variables and probability distributions
- 4.9Cumulative probability
- 4.10Expected value
- 4.11Variance and standard deviation of a random variable
- 4.12Linear transformations of a random variable
- 4.13Combining random variables