# Question

Which parts of Exercise 7.3 dealt with conditional probabilities?

In Exercise 7.3

Now suppose that because of the high level of ticket sales, an additional $250 second prize will also be awarded.

a) Given that you don’t win first prize, what is the probability that you will win second prize?

(The first-prize ticket is not put back into the hopper before the second-prize ticket is drawn.)

b) What is the probability that your mother will come in first and you will come in second?

c) What is the probability that you will come in first and she will come in second?

d) What is the probability that the two of you will take first and second place?

In Exercise 7.3

Now suppose that because of the high level of ticket sales, an additional $250 second prize will also be awarded.

a) Given that you don’t win first prize, what is the probability that you will win second prize?

(The first-prize ticket is not put back into the hopper before the second-prize ticket is drawn.)

b) What is the probability that your mother will come in first and you will come in second?

c) What is the probability that you will come in first and she will come in second?

d) What is the probability that the two of you will take first and second place?

## Answer to relevant Questions

Make up a simple example of a situation in which you are interested in conditional probabilities. Frame the issue in terms of a research hypothesis. What is the difference between a “distribution” and a “sampling distribution”? In the exercises in Chapter 2, we discussed a study of allowances in fourth-grade children. We considered that study again in Chapter 4, where you generated data that might have been found in such a study. (a) Consider how ...Down syndrome is another problem that psychologists deal with. It has been proposed that mothers who give birth at older ages are more likely to have a child with Down syndrome. Plot the data below relating age to incidence. ...Assume that a set of data contains a curvilinear relationship between X and Y (the best-fitting line is slightly curved). Would it ever be appropriate to calculate r on these data?Post your question

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