Mathematics, 15.04.2020 23:38 angelina0miles
National data in the 1960's showed that about 44% of the adult population had never smoked cigarettes. In 1995 a national health survey interviewed a random sample of 881 adults and found that 52% had never been smokers.
a) Create a 95% confidence interval for the proportion of adults (in 1995) who had never been smokers.
b) Does this provide evidence of a change in behavior among Americans? Using your confidence level, test an appropriate hypothesis and state your conclusion.
Answers: 2
Mathematics, 22.06.2019 01:00
3questions show how you solved the problem 1. subtract & simplify (–y2 – 4y – 8) – (–4y2 – 6y + 3) 2.multiply and simplify 2x2y3z2 · 4xy4x2 3.multiply and simplify (x – 4) (x2 – 5x – 6)
Answers: 1
Mathematics, 22.06.2019 05:30
Write the expression 7x^3-28xy^2 as the product of 3 factors
Answers: 1
National data in the 1960's showed that about 44% of the adult population had never smoked cigarette...
Mathematics, 30.03.2021 17:20
Mathematics, 30.03.2021 17:20
Business, 30.03.2021 17:20
Social Studies, 30.03.2021 17:20
Mathematics, 30.03.2021 17:20
Social Studies, 30.03.2021 17:20
Physics, 30.03.2021 17:20
English, 30.03.2021 17:20
Mathematics, 30.03.2021 17:20
Arts, 30.03.2021 17:20
Mathematics, 30.03.2021 17:20
History, 30.03.2021 17:20