Mathematics, 23.07.2020 16:01 harleyguerrieri
8.43 An advertising executive wants to estimate the mean amount of time that consumers spend with digital media daily. From past studies, the standard deviation is estimated as 45 minutes. a. What sample size is needed if the executive wants to be 90% confident of being correct to within {5 minutes
Answers: 1
![n = [\frac{z * \sigma }{E} ]^2](/tpl/images/0711/8050/76d40.png)
![n = [\frac{1.645 * 45 }{5} ]^2](/tpl/images/0711/8050/fc454.png)
![n = [\frac{2.576 * 45 }{5} ]^2](/tpl/images/0711/8050/5988f.png)
Other questions on the subject: Mathematics
Mathematics, 21.06.2019 14:00, kenziepickup
Roger and natalie travel in similar cars. roger's car drives the two miles to school in 7.5 minutes. natalie drives the same distance in the opposite direction but in only 6.5 minutes. what is true of their velocities?
Answers: 1
Mathematics, 21.06.2019 16:20, elkinsmarie88oyzd23
What are the soultion(s) to the quadratic equation 40- x^2=0
Answers: 1
You know the right answer?
8.43 An advertising executive wants to estimate the mean amount of time that consumers spend with di...
Questions in other subjects:
History, 16.12.2020 20:40
Mathematics, 16.12.2020 20:40
Mathematics, 16.12.2020 20:40
Mathematics, 16.12.2020 20:40
Mathematics, 16.12.2020 20:40
