Question

The article "Chances Are You Know Someone with a Tattoo, and He's Not a Sailor" included results from a survey of adults aged 18 to 50. The accompanying data are consistent with summary values given in the article. At Least One Tattoo No Tattoo Age 18–29 96 104 Age 30–50 24 176 Assuming these data are representative of adult Americans and that an adult American is selected at random, use the given information to estimate the following probabilities. (a) P(tattoo) (b) P(tattoo | age 18–29) (c) P(tattoo | age 30–50) (d) P(age 18–29 | tattoo)

Answer 1

Alleast one tattoo 2 No tattoo total age 18-29 96 104 200 age 30-50 24 176 200 total I 120 280 400 ap (tattoo ) = 120 1003) 400 & Pl tattoo | age 18-29) = 96 BP (A/B) = he hands) n (B) 200 10.48 s p ( tattoo fage 30-50) = 24 200 =10012 120 & PC age 18-29 / tattoo) = 96 = 96 = 008]