Homework Help: Math

Posted by Molly on Tuesday, May 25, 2010 at 11:52am.

FiberType HighCalorie LowCalori Totals
High Fiber 18 4 22
Medium Fiber 23 6 29
Low Fiber 12 21 33
Totals 53 31 84

3. What is the probability that a cereal would both high calorie and high fiber? In other words, what is P(high calorie and high fiber)?

4. What is the probability that a cereal would either high calorie or high fiber? In other words, what is P(high calorie or high fiber)?

5. What is the probability that a cereal would be high calorie, given that it is high fiber? In other words, what is P(high calorie, given high fiber)?

6. What is the probaility that a cereal would be high calorie, given that is is low fiber? In other words, what is P(high calorie, given low fiber)?

Math - PsyDAG, Tuesday, May 25, 2010 at 5:01pm
3. That one cell divided by grand total.

4. total high calorie/grand total + total high fiber/grand total

5. High calorie cell with high fiber/total high fiber

6. Similar process to 5.

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