A First Look at Chance Investigation 1

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A First Look at Chance Investigation 1 How
Likely Is It?
1.1 Flipping for Breakfast Kalvin, an eighth
grader always has cereal for breakfast. He likes
Cocoa Blast cereal so much that he wants to eat
it every morning. Kalvins mother wants him to
eat Health Nut Flakes at least some mornings
because its more nutritious than Cocoa
Blast. Kalvin and his mother have come up with a
fun way to determine which cereal Kalvin will
have for breakfast. Each morning Kalvin flips a
coin. If the coin comes up heads, he will have
Cocoa Blast. If he flips a tail he will have
Health Nut Flakes. Flip a coin 30 times to
determine Kalvins cereal for each morning in
June. Use Labsheet 1.1 to help you collect your
data. Record the result of the flip (H or T) and
the percent of heads so far. Use the data to
make a coordinate graph with the days for 1-30 on
the x axis and the percent of heads on the y
axis.
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Tally Chart
Number of Heads in ALL
Day Amount of Flips 1 2 3 4
Percent
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A First Look at Chance Investigation 1 How
Likely Is It?

• 1.2 Flipping for Breakfast
• Kalvin found a penny near a railroad track that
  had been bent and flattened. He decided to use
  this penny for determining his breakfast.
  Kalvins mother became suspicious of the penny at
  the end of June because Kalvin had eaten Health
  Nut Flakes only seven times.
• Why do you think she might have been suspicious?
• Do you think getting heads or tails is equally
  likely with Kalvins penny? What do you think
  equally likely means?
• How could Kalvin find out if his coin is fair?
• Ex. names in a hat Problem 1.2