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categoryإحصاء schoolبكالوريوس event_available2026-07-13

السؤال

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The table below gives the number of suicides estimated in the U.S. for a recent year by age, race (black or white), and sex. We are interested in possible relationships between age, race, and sex. We will let suicide victims be our population. Race and Sex 1-14 15-24 25-64 over 64 TOTALS white, male 210 3,355 13,615 22,050 white, female 80 580 3,375 4,930 black, male black, female 0 10 455 1,055 1,670 45 270 330 all others TOTALS 310 4,650 18,780 29,760 Part (a) Fill in the column for the suicides for individuals over age 64 and fill in the row for all other races. Race and Sex 1-14 15-24 25-64 over 64 TOTALS white, male 210 3,355 13,615 22,050 white, female 80 580 3,375 4,930 black, male 10 455 1,055 1,670 black, female 0 45 270 330 all others TOTALS 310 4,650 18,780 29,760 Part (b) Find the probability that a randomly selected individual was a white male. (Enter your probability as a fraction.) Part (c) Find the probability that a randomly selected individual was a black female. (Enter your probability as a fraction.) Part (d) Find the probability that a randomly selected individual was black. (Enter your probability as a fraction.) Part (e) Find the probability that a randomly selected individual was male. Do not include "all others" as male individuals. (Enter your probability as a fraction.) Part (f) Out of the individuals over age 64, find the probability that a randomly selected individual was a black or white male. Do not include "all others" as black or white male individuals. (Enter your probability as a fraction.)

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