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- Use a standard normal table or technology.P(Z < 1.43)P(Z < -0.82)P(Z > 2.14)P(Z \geq -1.36)P(-1.72 < Z < 0.46)
- Use a standard normal table or technology.the 65th percentile of Zthe 30th percentile of Zthe number c with P(-c < Z < c) = 0.60
- The figure shows the standard normal curve with two regions shaded:
- Some printed tables list the area under the standard normal curve between 0 and z, not the area to the left of z.
- Layla found P(-0.80 < Z < 1.30) like this:
- Use a standard normal table or technology.
Teach it first
The free lesson teaches it with worked examples and practice problems.
The standard normal distribution: 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