Survey
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Module 16: Probability Distributions Random Variable, x: A random Variable is ___________________________________ if it represents counted data. A random variable is_____________________________________ if it represents measured data. Determine whether the random variable x is discrete or continuous. 1. x represents the volume of blood drawn for a 2. x represents the attendance at the national blood test. statistics conference. 3. x represents the distance a football travels after being kicked. 4. x represents the number of hurricanes that hit the United States in 2012. A discrete probability distribution: The probability of each value is between 0 and 1. The sum of all probabilities is 1. Determine whether the distribution is a probability distribution. 5. 6. X P(x) X 7 0.28 1 8 0.21 2 10 0.43 3 13 0.08 4 P(x) 0.34 1.21 0.02 0.21 Expected Mean: We can measure the center of a probability distribution with its mean and standard deviation. Calculate the Mean and Standard Deviation of the following distribution with your graphing calculator! 7. 8. Cats Households P(x) Number of Math Classes HS Seniors P(x) 0 1262 Taken In HS 1 832 0 0 2 423 1 72 3 96 2 212 4 23 3 725 5 12 4 546 5 213 6 32 Σ . Σ . Σ . Calculate the Mean (expected value): Calculate the Mean (expected value): Calculate the Standard Deviation: Calculate the Standard Deviation: Interpretation: Interpretation: Σ .