Mathematics, 26.03.2020 23:26 kerra61
A study was conducted to determine the proportion of American teenagers between 13 and 17 who smoke. Previous surveys showed that 15% percent of all teenagers smoke. A Gallup survey interviewed a nationally representative sample of 785 teenagers aged 13 to 17. Seventy-one teenagers in the survey acknowledged having smoked at least once in the past week. Does the study provide adequate evidence to conclude that the percentage of teenagers who smoke is now different than 15%? Be sure to answer all the questions whether or not the requirements are actually met.
Answers: 1
Mathematics, 21.06.2019 20:30
Find the value of x for which line a is parallel to line b
Answers: 1
Mathematics, 21.06.2019 21:30
Suppose babies born after a gestation period of 32 to 35 weeks have a mean weight of 25002500 grams and a standard deviation of 800800 grams while babies born after a gestation period of 40 weeks have a mean weight of 27002700 grams and a standard deviation of 385385 grams. if a 3232-week gestation period baby weighs 21252125 grams and a 4040-week gestation period baby weighs 23252325 grams, find the corresponding z-scores. which baby weighs lessless relative to the gestation period?
Answers: 1
Mathematics, 21.06.2019 22:30
In a certain city, the hourly wage of workers on temporary employment contracts is normally distributed. the mean is $15 and the standard deviation is $3. what percentage of temporary workers earn less than $12 per hour? a. 6% b. 16% c. 26% d. 36%
Answers: 1
Mathematics, 22.06.2019 02:30
(fog)(x) if f(x)=x^2- 4 and g(x)=x^2 + 2 x, f(g(x))= f(x^2+2x) (x^2+2x)^2-4 (x^2+2x)(x^2+2x)-4 (x^4+2x^3+5x+4x^2)-4 x^4+2x^3+4x^2+5x-4 what am i doing wrong
Answers: 1
A study was conducted to determine the proportion of American teenagers between 13 and 17 who smoke....
Mathematics, 20.11.2020 20:40
Mathematics, 20.11.2020 20:40
Arts, 20.11.2020 20:40
Mathematics, 20.11.2020 20:40
Biology, 20.11.2020 20:40
Mathematics, 20.11.2020 20:40
Social Studies, 20.11.2020 20:40
Mathematics, 20.11.2020 20:40
History, 20.11.2020 20:40
Arts, 20.11.2020 20:40