# Question

Consider the four-question multiple-choice quiz presented at the beginning of this section

a. Explain why the four questions represent four independent trials.

b. Explain why the number 4 is multiplied into the P(x _ 1)

c. In Answer 5 on page 246, where did 1/3 and 4 come from? Why multiply them to find an expected average?

a. Explain why the four questions represent four independent trials.

b. Explain why the number 4 is multiplied into the P(x _ 1)

c. In Answer 5 on page 246, where did 1/3 and 4 come from? Why multiply them to find an expected average?

## Answer to relevant Questions

a. Explain why the variable “number of saved telephone numbers on a person’s cell phone” is discrete. b. Explain why the variable “weight of a statistics textbook” is continuous. A die is rolled 20 times, and the number of “fives” that occur is reported as being the random variable. Explain why x is a binomial random variable. a. Calculate P(4) and P(5) for Example 5.8 on page 249. b. Verify that the six probabilities P (0), P(1), P(2), . . . , P(5) form a probability distribution. According to the article “Season’s Cleaning,” the U.S. Department of Energy reports that 25% of people with two-car garages don’t have room to park any cars inside. Assuming this to be true, what is the probability ...Consider the manager of Steve’s Food Market as illustrated in Example 5.9.What would be the manager’s “risk” if he bought “better” eggs, say with P(bad) _ 0.01 using the “more than one” guarantee?Post your question

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