Suggested Review for test Ch. 6: Study notes, HW, Daily Grades, Quiz

QUIZ 6.1 & 6.2 --- 20 minutes GET OUT YOUR TEXTBOOK • Suggested Review for test Ch. 6: • Study notes, HW, Daily Grades, Quiz • p. 453 – 455 #85 – 95 (more practice for Section 6.3) • p. 459 – 460 #98, 100 – 106

Advanced Placement Statistics Section 7.1: Discrete and Random Variables EQ: How do you calculate the probability of a random variable?

Terms to Know: • Random Variable--- variable with a numericaloutcome; notation is capitalX • Always DEFINE your Random Variable: X = number ofheads from tossing a coin X= number ofhours spent studying ETC…

Discrete Random Variables--- countable number of outcomes; corresponds to specific points on the number line Recall: Properties of a Probability Distribution 1) 0 <p(x)< 1

Ex. The following table represents a probability distribution for a DRV, X. What is P(X = 6)? P(X = 6) = .35 create probability histograms: Distributions

RECALL: Frequency vs Relative Frequency actual counts of outcome count of outcome relative to whole

In class: p. 470 #2 a) Create the sample space. S = ______________________________ b) Create a probability distribution for this sample space.

p. 470 #3 a) Write your answer 2 ways. b)

Continuous Random Variable--- assumes values associated with intervals on the number line; infinite number of outcomes Probability Distribution of a CRV--- defined by a density curve

Recall: Area under Probability of Density Curve = CRV Ex. For the CRV X, find P(X = 0.8). P(0.79 < X < 0.81) = ______ P(0.799 < X < 0.801) = _____ P(0.7999 < X < 0.8001) = _____ ***As X  0.8, P(X = 0.8) ______

Therefore: NO PROBABILITY exists at single values of X on a CRV density curve. WHY?? No distinction between > and > No distinction between < and < • Assignment: p. 475 #7, 8

N (, ) Normal Distribution Recall:

Standard Normal Distribution N (0, 1)

Assignment: p. 478 #12, 13, 15, 17

Suggested Review for test Ch. 6: Study notes, HW, Daily Grades, Quiz