Algebra 1B – Name __________________________ Summary Statistics Notes Date ___________________________ MEAN Often referred to as the ___________ The mean is found by _____________________________________________________ ______________________________________________________________________ Example: You earned the following scores on your Unit Tests this marking period: 80, 72, 83, 86. Find the mean of the scores. MEDIAN The median is found by ____________________________________________________ ______________________________________________________________________ Example 1: Find the median of the following data set: 2, 5, 9, 11, 15, 19, 21, 27, 31. Example 2: Find the median of the test scores: 80, 72, 83, 86. MODE The mode is ____________________________________________________________ Ex 1: Find the mode of the data set: 5, 6, 7, 7, 8, 9, 9, 9, 9, 10, 11 Ex 2: Find the mode of the data set: 7, 7, 11, 15, 15, 17, 18, 22 Ex 3: Find the mode of the data set: 1, 2, 3, 4, 5 RANGE The range is found by ___________________________________________ ______________________________________________________________________ Example: Find the range of the data set: 5, 9, 1, 3, 10, 15, 27, 4

LOWER & UPPER QUARTILE The lower quartile is ______________________________________________________ The upper quartile is ______________________________________________________ Median: _______ Lower Quartile: _______ Upper Quartile: _______ INTERQUARTILE RANGE (IQR) The interquartile range is found by ___________________________________________ ______________________________________________________________________ Lower Quartile: _______ Upper Quartile: _______ IQR: _______ Lower Quartile: _______ Upper Quartile: _______ IQR: _______ Let’s Put it all Together! 2, 6, 10, 22, 23, 10, 8, 10, 4, 4, 18, 14 Mean: ________ Median: _______ Mode: ________ Range: ________ Upper Quartile: _______ Lower Quartile: _______ IQR: _______

Algebra 1B – Notebook Entry #_____ Name __________________________ Probability Notes Date ___________________________ PROBABILITY __________________________________________________ P(Event) = ______________ We express probability as a ___________, _____________ or _______________. Example 1: Given a bag of marbles: 15 white, 3 red, 4 blue and 8 yellow. What is the probability… a) of picking white? b) of picking red? c) of picking blue? d) of picking yellow? e) of not picking red? f) of picking either yellow or blue? COMPOUND PROBABILITY _______________________ ____________________________________________________ Ex2. The spinner to the right is spun and a six-sided die is rolled. Find the probability of the spinner landing on red and the die landing on a 5. Ex3. I purchase a bag of M&Ms. There are 9 red, 11 brown, 10 blue, and 4 yellow M&Ms in the bag. After I pick one, I replace it before picking the next. a) P(red, then blue) b) P(brown then yellow) c) P(two yellows in a row)

Keystone Exam: Multiple Choice Questions Ex4. Using a standard deck of cards (52 cards in a deck), and after one card is selected, it is not placed back in the deck. a) P(heart, then spade) b) P(King, then an Ace) c) P(two Aces in a row) Keystone Exam: Multiple Choice Questions