11:00 Week 1 Wednesday Data

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11:00 Week 1 Wednesday Data

  1. 1. • 1. Review: Decimal Division• 2. Review: Mean, Median, Mode, Range• 3. Bar Graphs• 4. HW- Exercises 2 and 3
  2. 2. Dividing Decimals• If the divisor is not a whole number, move 3.8) 1614.62 decimal point to right to make it a whole number• Move decimal 38)16146.2 point in dividend the same number of places.
  3. 3. Dividing Decimals• Divide as usual. 42 4 9 Keep dividing until the answer 38) 16146.2 terminates or a 152 repeating pattern 94 shows up. 76•Position the decimal 186point in the quotient 152directly above the 34 2decimal point in the 342dividend. 0
  4. 4. • 1. Find the mean of the following test scores:• 88% 22% 90% 82% 95%• The mean is 75.4%• 2. Find the median of the test scores.• 22% 82% 88% 90% 95%• The median is 88%• 3. Why do the mean and median differ so greatly?• The mean and median differ because of the low test score of 22%.
  5. 5. • Complete the Bowling with the Pros and Hockey Stats with your table.
  6. 6. • On March 31, in San Diego, a meteorologist reported 60° F as the high temperature for the day for the first time during March. The meteorologist also reported 60°F as the median high temperature for San Diego for the month. On how many March days in San Diego was the high temperature lower than 60°F? 60 These values are below 60° These values are above 60° 1 day 15 days 15 days
  7. 7. • Tim collected data on his height (to the nearest inch) and that of four of his friends, but he lost the data. Time was the tallest, measuring 72 inches. Also, no two friends had the same height. Tim had calculated the following measures: median= 68, mean = 68, range= 7. Figure out what the original data was. Tim’s Data 1. How many values do we need to find?Mean 68 2. How many do we know?Median 68 3. What does the range tell us?Range 7 4. What does the median tell us? 5. What does the mean tell us? 6. What else do we know about the data?
  8. 8. • Tim collected data on his height (to the nearest inch) and that of four of his friends, but he lost the data. Time was the tallest, measuring 72 inches. Also, no two friends had the same height. Tim had calculated the following measures: median= 68, mean = 68, range= 7. Figure out what the original data was.1. How many values do we need to find? 52. How many do we know? 23. What does the range tell us? The range tells us the value of the shortest height.4. What does the median tell us?The median tells us the EXACT middle height.5. What does the mean tell us? The number AFTER all heights have been added and divided.6. What else do we know about the data? There is no mode.
  9. 9. • Tim collected data on his height (to the nearest inch) and that of four of his friends, but he lost the data. Time was the tallest, measuring 72 inches. Also, no two friends had the same height. Tim had calculated the following measures: median= 68, mean = 68, range= 7. Figure out what the original data was. Tim’s Data 1. How many values do we need to find?Mean 68 2. How many do we know?Median 68 3. What does the range tell us?Range 7 4. What does the median tell us? 5. What does the mean tell us? 6. What else do we know about the data?
  10. 10. • Data can be Month Temp (°F) displayed on a January 13 April 35 graph. July 58• A graph gives a October 35 picture of the data. Average Monthy Temp in Anchorage, AK• A bar graph is used 80 60 for visual 40 comparisons. 20 0 January April July October
  11. 11. Title Average Monthy Temp in Anchorage, AK80604020 0 Horizontal Axis January April July October (items being compared) Vertical Axis (numbers representing temperatures)
  12. 12. Average Monthly Temperatures in What is the average Los Angeles, CA temperature in Los80 Angeles in April?7060504030 The average20 temperature100 is 60° for the January April July October month of April.
  13. 13. Average Monthly Temperatures in In what month is Los Angeles, CA the average80 temperature in Los7060 Angeles 69°?5040 Since there isn’t30 a 69° on the2010 vertical axis, you0 must choose the January April July October one which is closest to 70°
  14. 14. Average Monthly Temperatures in What is the range of Los Angeles, CA average monthly80 temperatures in Los70 Angeles?605040 Find the highest30 temperature and2010 subtract the0 lowest January April July October temperature from it.
  15. 15. • Exercise 2- Answer the questions based on the information presented in both of the bar graphs.• Exercise 3- Drawing Bar Graphs

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