1. #25-1 February 14, 2011 Find the unit rate for the given ratio: 1)141 books in 3 classes Find the mode of the given data 2)13, 18, 14, 18, 12 3) While looking around at a yard sale, Theresa found a table with a stack of Cds on it. The prices for the CDs are: $2.50, $3.00, $3.00, $6.00, $6.50, $7.50. What is the mean price of a CD at this yard sale?

3. Examples of measures of central tendency:

4. The Median The ______ is the _____________ in an ordered set of data. Step 1: List the numbers from ______ to _______. Step 2 Identify the _____________ in the list.

5. Miles Meg Walked DayMiles Monday4 Tuesday5 Wednesday6 Thursday1 Friday1

6. Miles Meg Rode Her Bike DayMiles Sunday4 Monday6 Tuesday1 Wednesday2 Thursday1 Friday5 Saturday2

8. The _____ is the number found by_______ a set of numbers and __________ the sum by the number of addends. The ________ is the ________ number in an ordered set of data. Step 1 List the numbers from ______ to ________. Step 2 Identify the _______ number in the list.

10. Circle the outlier for each data set. Find the MEAN for each data set with and without the outlier. Explain what effect the outlier had on the MEAN.

11. #25-2 February 15, 2011 Are these rates equivalent? 1) Find the percent of the given number 2)8.3% of 75 3) A football team has linemen whose weights, in pounds, are: 295, 280, 290, 310, 335, 300, 345, 345 What is the median weight of the linemen?

12. FIND THE MODE ♠ find which number is written the most (occurs most often) OR ♠ find the number that has the most X on the line plot (you may have more than one answer)

13. Find the MODE 4, 6, 6, 5, 4, 8, 9, 6 ♠ find which number is written the most THE MODE OF THIS SET OF NUMBERS IS How did you find your answer? _______________________________________

14. LET’S DO ANOTHER ONE 11, 19, 8, 11, 15, 8, 9 ♠ find which number is written the most THE MODE OF THIS SET OF NUMBERS IS How did you find your answer? _______________________________________

16. 17, 17, 13, 14, 12, 11, 17 mode:__________ 20, 17, 15, 20, 18 mode:__________ 3, 2, 2, 2, 0, 6, 1 mode:__________ 5, 5, 7, 3, 2, 1 mode:__________ The _______ is the number that occurs __________.

18. Can you find the mean and the median of the shirt color and talent show tables? Explain. ____________________________________________________________________________ What is the MEDIAN age of the Little League players? (HINT: age 10 shows 3 so you would write: 10, 10, 10). ____________________________________________ IF I replaced a black shirt with a pink shirt, would that change the mode? Explain. ____________________________________________________________________________

19. #25-3 February 16, 2011 Find the UNIT RATE 1)A cyclist travels 109km in 4 hours Find the mean of the given data 2)121, 118, 127, 121, 123, 126, 125, 124 3) The table below lists the top running speed, in miles per hour, for several animals. What is the median speed listed?

20. FIND THE RANGE ♠ find the __________ number and the __________ number ♠ __________

22. 4, 6, 6, 5, 4, 8, 9 ♠ find the __________ number and the __________ number ♠ __________ THE RANGE IS: _____

23. 11, 19, 8, 11, 15, 8 ♠ find the __________ number and the __________ number ♠ __________ THE RANGE IS: _____

24. 17, 17, 13, 14, 12, 11__________ 20, 17, 15, 20, 18__________ 3, 2, 2, 2, 0, 6, 1, 0__________ 5, 5, 8, 7, 3, 2, 1, 1__________

25. Find the range with the 30-year old. ______________ How was the RANGE effected by the change? _____________________________________________ __________________________________________________________________________________________

27. Explain the affect to the mode: ____________________________________

28. #25-4 February 17, 2011 Which is the better buy? 1)9 ounces of sliced turkey for $4.99/lb 13 ounces of sliced turkey for $6.69/lb What is the range of the data? 2) 69, 71, 71, 100, 85, 93, 61 3) The heights of the students in a 6 th grade chess club are shown in the stem-and-leaf plot below. What is the mode height?

29. Include: scale, scale label, data groups, label for data groups, title Each person must role 20 times. You will have different data!

30. Make your bar graph here for YOUR data! Compare your mean, median, mode, range and graph with your partner. What differences do you see? ________________________________________________________________________________________________________________________________________________ Explain why you have these differences. ________________________________________________________________________________________________________________________________________________

33. #25-5 February 18, 2011 Which truck has the better fuel economy 1)Truck A: 393 miles on 25 gallons fuel Truck B: 309 miles on 20 gallons fuel Which one is GREATER? 2) 1.267 _____ 12.67% 3) A patrolman is tracking the speeds of cars on the interstate one afternoon. The bar graph below show the speeds of some of the cars. What is the range of the car speeds?