WARMUP

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WARMUP

• WRITE 3,450,000,000 IN SCIENTIFIC NOTATION
• WRITE .000325 IN SCIENTIFIC NOTATION
• WRITE 3.05 X 10-4 IN DECIMAL NOTATION
• If a right angle triangle has one ANGLE OF 37
  DEGREES and a SECOND ANGLE OF 53 DEDGRES, what is
  the MEASURE OF THE THIRD ANGLE IN DEGREES?

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STATISTICS-MEASURES OF CENTRAL TENDENCY

• MATHEMATICS
• MR. SKRTICHS CLASS

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STATISTICS

• STATISTICS
• INFORMATION THAT HAS BEEN COLLECTED, ANALYZED,
  AND PRESENTED IN AN ORGANIZED FASHION.

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WHAT ARE EXAMPLES OF THINGS THAT WE WOULD USE
STATISTICS IN OUR DAILY LIFE?
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HOW ABOUT

• FINDING TEMPERATURES FOR ANY GIVEN PLACE AT ANY
  GIVEN TIME OF THE YEAR.
• CARS - MILAGE PER GALLON OF GAS.
• STOCK MARKET - EARNINGS PER SHARE.
• CANDY BARS - WEIGHT PER PACKAGE

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EXAMPLES OF STATISTICAL INFORMATI0N

• AVERAGE TEMPERATURE IN MAINE ON DECEMBER 21.
• NUMBER OF RAISINS IN A BOX OF RAISIN BRAN.
• THE MEDIAN AGE OF STUDENTS IN A 7TH GRADE MATH
  CLASS.
• THE RANGE OF SHOE SIZE IN THE NFL.

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WHAT IS THE FOUR MAIN TERMS WE USE IN STATISTICS?

• MEAN
• MEDIAN
• MODE
• RANGE

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WRITE THIS DOWN
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WHAT IS A MEAN?

• THE MEAN IS THE SUM OF THE NUMBERS IN A SET OF
  DATA DIVIDED BY THE NUMBER OF PIECES OF DATA.

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WHAT IS A MEDIAN?

• THE MEDIAN IS NUMBER IN THE MIDDLE IN A SET OF
  DATA WHEN THE DATA ARE ORGANIZED FROM THE LEAST
  TO THE GREATEST.

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WHAT IS A MODE?

• THE NUMBER OR ITEM THAT APPEARS MOST OFTEN IN A
  SET OF DATA.

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WHAT IS A RANGE?

• THE DIFFERENCE BETWEEN THE GREATEST AND LEAST
  NUBMER IN A SET OF DATA.

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STATISTICS

• WHY IS STATISTICS IMPORTANT?
• WE CAN PREDICT THE POSITIVE OUTCOME WITH KNOWN
  PAST DATA.
• WE CAN PREDICT THE NEGATIVE OUTCOME WITH KNOWN
  PAST DATA.

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EQUATIONS - RECAP

• KNOWING THE CENTRAL TENDENCY OF DATA CAN HELP IN
  INTERPRETING DATA.
• KNOWING THE MEAN, MEDIAN, MODE, AND RANGE DATA
  CAN HELP US INTERPRET THIS DATA.

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FIND THE MEAN, MEDIAN, MODE, RANGE OF THE
FOLLOWING DATA
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BOWLING SCORES
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BOWLING SCORES
669 699 705 _____ 2073
MEAN
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BOWLING SCORES
669 699 705 _____ 2073
2073/15 138.2
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BOWLING SCORES
MEDIAN
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BOWLING SCORES
115 121 124 130 131 131 131 137 143 143 143 152
156 156 158
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BOWLING SCORES
MODE
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BOWLING SCORES
115 121 124 130 131 131 131 137 143 143 143 152
156 156 158
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BOWLING SCORES
115 121 124 130 131 131 131 137 143 143 143 152
156 156 158
TWO MODES 131 AND 143
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BOWLING SCORES
RANGE
158 115 43
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HOMEWORK DO PAGE 140 1 TO 11.