Statistics Review. Box-and-Whisker Plots The Parts of a Box and Whisker Plot 123 54 Name the parts of a Box-and-Whisker Plot MedianUpper Quartile Lower.

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Presentation transcript:

Statistics Review

Box-and-Whisker Plots

The Parts of a Box and Whisker Plot Name the parts of a Box-and-Whisker Plot MedianUpper Quartile Lower Quartile Lower ExtremeUpper Extreme

Create a Box and Whisker Plot

Normal Distribution a. What percent of people have between 565 and 691 friends? b. How many people have more than 880 friends? The number of facebook friends that 900 people had follows a normal distribution with a mean of 754 and a standard deviation of 63.

Fundamental Counting Principle Fundamental Counting Principle can be used determine the number of possible outcomes when there are two or more characteristics. Fundamental Counting Principle states that if an event has m possible outcomes and another independent event has n possible outcomes, then there are m * n possible outcomes for the two events together.

Fundamental Counting Principle Lets start with a simple example. A student is to roll a die and flip a coin. How many possible outcomes will there be? 1H 2H 3H 4H 5H 6H 1T 2T 3T 4T 5T 6T 12 outcomes 6*2 = 12 outcomes

Fundamental Counting Principle For a college interview, Robert has to choose what to wear from the following: 4 slacks, 3 shirts, 2 shoes and 5 ties. How many possible outfits does he have to choose from? 4*3*2*5 = 120 outfits

Permutations A Permutation is an arrangement of items in a particular order. Notice, ORDER MATTERS! To find the number of Permutations of n items, we can use the Fundamental Counting Principle or factorial notation.

Permutations The number of ways to arrange the letters ABC: ____ ____ ____ Number of choices for first blank ? 3 ____ ____ 3 2 ___ Number of choices for second blank? Number of choices for third blank? *2*1 = 6 3! = 3*2*1 = 6 ABC ACB BAC BCA CAB CBA

Permutations To find the number of Permutations of n items chosen r at a time, you can use the formula

Permutations A combination lock will open when the right choice of three numbers (from 1 to 30, inclusive) is selected. How many different lock combinations are possible assuming no number is repeated? Practice: Answer Now

Permutations A combination lock will open when the right choice of three numbers (from 1 to 30, inclusive) is selected. How many different lock combinations are possible assuming no number is repeated? Practice:

Permutations From a club of 24 members, a President, Vice President, Secretary, Treasurer and Historian are to be elected. In how many ways can the offices be filled? Practice: Answer Now

Permutations From a club of 24 members, a President, Vice President, Secretary, Treasurer and Historian are to be elected. In how many ways can the offices be filled? Practice:

Combinations A Combination is an arrangement of items in which order does not matter. ORDER DOES NOT MATTER! Since the order does not matter in combinations, there are fewer combinations than permutations. The combinations are a "subset" of the permutations.

Combinations To find the number of Combinations of n items chosen r at a time, you can use the formula

Combinations To find the number of Combinations of n items chosen r at a time, you can use the formula

Combinations To play a particular card game, each player is dealt five cards from a standard deck of 52 cards. How many different hands are possible? Practice: Answer Now

Combinations To play a particular card game, each player is dealt five cards from a standard deck of 52 cards. How many different hands are possible? Practice:

Combinations A student must answer 3 out of 5 essay questions on a test. In how many different ways can the student select the questions? Practice: Answer Now

Combinations A student must answer 3 out of 5 essay questions on a test. In how many different ways can the student select the questions? Practice:

Combinations A basketball team consists of two centers, five forwards, and four guards. In how many ways can the coach select a starting line up of one center, two forwards, and two guards? Practice: Answer Now

Combinations A basketball team consists of two centers, five forwards, and four guards. In how many ways can the coach select a starting line up of one center, two forwards, and two guards? Practice: Center: Forwards:Guards: Thus, the number of ways to select the starting line up is 2*10*6 = 120.