Statistics

3. A bookstore sells two types of books (fiction and nonfiction) in several formats
(hardcover, paperback, digital, and audio). Consider an experiment that consists of
observing the type and format of a single book purchase, two possible outcomes are a
hardcover fiction book and an audio fiction book. The number of all outcomes the
sample space would include is:
(a) 4
(b) 16
(c) 32
(d) 8
(e) 12

4. Consider problem 3. For customers who purchase a single book, the estimated
probabilities for different possible outcomes are given in the table below.
Hardcover Paperback Digital Audio
Fiction
Nonfiction
0.15 0.45 0.10 0.10
0.08 0.04 0.02 0.06
What is the probability that a randomly selected single‐book purchase will be for a book in
print format (hardcover or paperback)?
(a) 0.60
(b) 0.23
(c) 0.49
(d) 0.32
(e) 0.72

1. 👍 0
2. 👎 0
3. 👁 91
1. 8.15

1. 👍 0
2. 👎 0
posted by john
2. 13

1. 👍 0
2. 👎 1
posted by poop
3. 15

1. 👍 0
2. 👎 1
posted by sdf

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