Quiz 2-3 Review

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Quiz 2-3 Review

• Day 2

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Question 1

• Yellowstone National Park surveyed a random
  sample of 1526 winter visitors to the park. They
  asked each person whether they owned, rented, or
  had never used a snowmobile. The participants
  were also asked if they belonged to an
  environmental organization to determine of there
  is an association between environmental club
  membership and snowmobile use for the population
  of visitors to Yellowstone National Park.

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Question 2
  Females Males Total
Biology 205 185 390
Chemistry 240 250 490
Physiology 160 140 300
Total 605 575 1180

• 1) A female student taking biology.
• 2) A male student.
• 3) A biology student given she is female.
• 4) A male physiology student.
• 5) A student known to be enrolled in chemistry,
• that is male.
• 6) A male chemistry student.

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Drink Size Season Season Season Totals
Drink Size Spring Summer Fall Totals
Small 24 22 18 64
Medium 23 28 19 70
Large 18 27 29 74
Jumbo 16 21 33 70
Totals 81 98 99 278
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4) Write a sentence or two about the conditional
relative frequency distribution of the drink size
among the Summer season.

1. What percent of the responses were from
   respondents who favor small drinks?
2. What percent of those who order Large drinks
   prefer them in the fall?
3. What is the marginal distribution of Seasons?