Probability and Two-Way Tables – Flashcards
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A fast-food restaurant kept information about the drunks that were ordered along with the different-sized kids' meals, as shown in the table. Which statements are true? Check all that apply.
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Milk was requested for 16 of the large-sized meal orders. Sixty-three of the orders of soda came with a regular-sized meal. A total of 124 large-sized meals were ordered.
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Information about the students at Jackson High School is shown in the table. Which statement must be true?
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a. Out of the 352 eleventh graders at the school, 173 of them are girls.
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Mr. Caramdang sold a total of 1,790 prints of one of his drawing. Out of all 1,273 unframed prints that he sold, 152 were small and 544 were medium-sized. Out of the framed prints that he sold, 23 were small and 42 were extra large. Of the large prints that he sold, 188 were framed and 496 were unframed. Which number is missing from the two-way table?
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c. 517
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The two-way table shows the number of houses on the market in the Castillos' price range. What is the probability that a randomly selected house with 2 bathrooms has 3 bedrooms?
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d. 0.8
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Information about a shipment of mirrors to a local store is shown. Of all the medium mirrors that were shipped, how many of them were broken?
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d. 68
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A survey was taken of children between the ages of 7 and 12. Let A be the event that the person rides the bus to school, and let B be the event that the person has 3 or more siblings. Which statement is true about whether A and B are independent events?
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d. A and B are not independent events because P(A | B) = 0.375 and P(A) = 0.25.
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Information about the recycling drive at school is shown in the table. Let A be the event that the item pulled out of the recycling bin in a plastic bottle, and let B be the event that a tenth grader recycled that item. Which statement is true about whether A and B are independent events?
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c. A and B are not independent events because P(A|B) =/ P(A).
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The two-way table shows the medal count for the top-performing countries in the 2012 Summer Olympics. Which statement is true?
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a. The probability that a randomly selected silver medal was awarded to Great Britain is 17/99.
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Which statement is true about whether C and Y are independent events?
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d. C and Y are not independent events because P(C|Y) =/ P(C).
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The two-way table shows the estimated number of students who will enroll in three area high schools next year. In decimal form, to the nearest tenth, what is the probability that a randomly selected Riverside High School student is in twelfth grade?
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0.4
