Warmup Time

1
Warm-up Time

• Paper and pencil out!
• You will be given 20 seconds per screen to solve
  the five problems.
• I will begin in two minutes!!

Thursday, Sept. 30, 2004
2
Warm-up

• Round 4.263 to the nearest tenth.

3
Warm-up

• Compare the calculation to the estimate. Is the
  estimate reasonable?

4
Warm-up

• Tomatoes cost 2.71, peppers cost 1.73, and
  cilantro costs 1.10. Estimate the total cost of
  the vegetables.

5
Warm-up

• Estimate the average cell phone charge for the
  months shown below
• May 39.35
• June 41.40
• July 38.90
• August 38.55

6
Warm-up

• Arlene bought 6 yd of fabric to make a Lone Star
  quilt. The fabric cost 6.79/yd. The sales
  clerk charged Arlene 45.90 before tax. Did the
  clerk make a mistake? What do you estimate the
  total to be before tax?

7
Making Numbers Look Meaningful

• SDAP 1.3 Eric Bitter

8
Why take a survey?

• Brainstorm with your neighbor and write down
  bullets of information.
• What are some ways to show your results?

9
Predictions Before You Survey in Paragraph Form

• Survey Question How often do you brush your
  teeth (per week)?
• What do you think the median (middle) number will
  be out of 20 students?
• Least and greatest amount?
• How will the boy data differ from the girls?
• What is the best way to display the data?
• Predict the charts with a sketch.

10
Frequency Table

• Collect information using a frequency table (10
  for boys and 10 for girls)
• Upon completion, order data least to greatest

11
The data can be shown in a graph form

• Box and Whiskers
• Stem and Leaf
• Graph of your choice (Bar, Line, or Pie)

12
Final Thoughts Reflections

• What was surprising about the data you collected?
• Does the data represent Fresno? California?
  U.S.?
• Where would this NOT happen?
• Compare/contrast the predicted vs. actual outcome
  of the data.
• Using the data you collected if you were to
  survey 1000 people, what kind of results would
  you expect?
• Is the median for 1000 people the same as the
  median for your sample?

13
Your Survey Project Assignment Due Oct. 11, 2004

• Written paragraph on your predictions.
• Survey 10 boys 10 girls in a frequency table
  formdue Friday, Oct. 1, 2004 for class
• Construct/interpret Box and Whisker Plot
• Construct/interpret Stem and Leaf Plot
• Construct/interpret Students Choice graph
• Written reflection paragraph on the project based
  on the questions presented