S 5 explain the difference between 2 x and i x 2 x

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s 5. Explain the difference between 2 x and i x . 2 x represents the second observed x -value, while i x represents all possible x -values. 6. Identify the letter that represents the standard normal variable. z 7. Which letter represents the slope of the least-squares regression line? b 8. Which letter represents the y-intercept of the least-squares regression line? a 9. Explain the difference between y , ˆ y , and y . y represents the observed y -values, ˆ y represents the predicted y -values, and y represents the average y -value 10. Explain the difference between 2 y and 2 ˆ y . 2 y represents the second observed y -value, 2 ˆ y represents the second predicted y -value 11. Identify the letter used for correlation. r 12. Which letters are most commonly used for random variables? X and Y 13. Explain the difference between the variables x and X. X is a random variable and x is not 14. Identify the letter that represents the number of observations in a sample. n 15. Identify the letter used for the probability of an event. P
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AP Statistics Name: Notation Quiz Date: Pd: Explain what each of the following represent, and when they would be used. 1. ˆ p 2. p 3. 0 p 4. p value 5. z 6. * z 7. * z 8. 0 H 9. A H 10. n 11. N
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12. ˆ np 13. ˆ nq 14. 0 np 15. 0 nq 16.
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