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- A random variable X has _X = 15 and _X = 4.X - 92.5X-X0.5(40 - 3X)\dfrac{X - 3}{4}
- A mobile knife sharpener charges a stop fee of 20 dollars for each house visit plus 14 dollars for each knife sharpened on the visit.
- Elena pays for purchases on a trip abroad in euros.
- Mateo delivers firewood around town.
- A car rental desk asks customers how much they agree with the statement "Picking up the car took too long," from 1 (strongly disagree) to 5…
- At a weekly night market, the number of trays of dumplings X that one stall sells in a night has _X = 42 and _X = 6, and the number of crepes Y that…
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Linear transformations of a random variable: 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