The librarian continues to record the type of item that the next 20 patrons check out from the library. patron item type 11 fiction book 12

Question

The librarian continues to record the type of item that the next 20 patrons check out from the library. patron item type 11 fiction book 12 non-fiction book 13 fiction book 14 fiction book 15 fiction book 16 non-fiction book 17 fiction book 18 non-fiction book 19 fiction book 20 DVD 21 fiction book 22 non-fiction book 23 fiction book 24 fiction book 25 audiobook 26 fiction book 27 DVD 28 non-fiction book 29 fiction book 30 DVD Based on the information from these patrons, estimate the probability that the next patron will check out a fiction book.

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Đan Thu 3 years 2021-07-31T19:32:55+00:00 1 Answers 8 views 0

Answers ( )

  1. hongcuc2
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    2021-07-31T19:34:37+00:00
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    Answer:

    Pr = 0.55

    Step-by-step explanation:

    Given

    Represent the dataset with the following frequency table

    \begin{array}{cc}{Item} & {Frequency} & {Fiction\ Book} &{11} & {Non\ Fiction\ Book} & {5} & {DVD} & {3} & {Audiobook} & {1} \ \end{array}

    Required

    Probability that the next checkout will be fiction

    From the above frequency table, we have:

    Fiction\ Book = 11

    n =20 — total

    So, the probability that the next checkout item is a fiction book is:

    Pr = \frac{Fiction\ Book}{n}

    Pr = \frac{11}{20}

    Pr = 0.55

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