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What's on the worksheet
- A bakery's sourdough loaves have masses modeled by N(820, 8), in grams.
- The times a ferry takes to cross a lake are modeled by N(38, 2.5), in minutes.
- A lathe turns wooden dowels whose diameters are modeled by N(12.0, 0.2), in millimeters.
- A puzzle app times how long players take to finish its daily crossword.
- A bus company models the times its buses take to run one route by N(46, 4), in minutes.
- A factory cuts floor tiles whose lengths are normal with mean 299 mm.
Teach it first
The free lesson teaches it with worked examples and practice problems.
Normal calculations: areas and percentiles: 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