![Mathematics](/tpl/images/cats/mat.png)
Mathematics, 27.02.2020 19:13, jetblackcap
The city of Alameda is surveying residents to learn the proportion of smartphone users. They know that only
smartphones use data. They sampled active cell phone plans from five service providers to determine the proportion
that include data in the plan. Below are the results. What is the approximate confidence interval at 95% confidence level
for population proportion of smartphones to cell phones?
All cell phones Smartphones
(thousands) (thousands)
100
120
54
|
67
65
The survey indicates that 85% to 93% of cell phone plans include data for a smartphone.
The survey shows that 88% to 93% of subscribers to a cell phone plan own a smartphone.
The survey shows that 86% to 92% of cell phone plans include data for a smartphone.
The survey shows that 91% to 94% of subscribers to a cell phone plan own a smartphone.
![answer](/tpl/images/cats/otvet.png)
Answers: 1
Other questions on the subject: Mathematics
![image](/tpl/images/cats/mat.png)
Mathematics, 21.06.2019 16:50, mahadharun
Iq scores for adults age 20 to 34 years are normally distributed according to n(120, 20). in what range does the middle 68% of people in this group score on the test?
Answers: 1
![image](/tpl/images/cats/mat.png)
![image](/tpl/images/cats/mat.png)
Mathematics, 21.06.2019 19:00, heartykwarteng12
The reflexive property of congruence lets you say that ∠pqr ≅
Answers: 1
![image](/tpl/images/cats/mat.png)
Mathematics, 21.06.2019 19:30, osnielabreu
The total ticket sales for a high school basketball game were $2,260. the ticket price for students were $2.25 less than the adult ticket price. the number of adult tickets sold was 230, and the number of student tickets sold was 180. what was the price of an adult ticket?
Answers: 2
Do you know the correct answer?
The city of Alameda is surveying residents to learn the proportion of smartphone users. They know th...
Questions in other subjects:
![Konu](/tpl/images/cats/en.png)
English, 30.09.2019 06:30
![Konu](/tpl/images/cats/biologiya.png)
Biology, 30.09.2019 06:30
![Konu](/tpl/images/cats/mat.png)
Mathematics, 30.09.2019 06:30
![Konu](/tpl/images/cats/istoriya.png)
History, 30.09.2019 06:30
![Konu](/tpl/images/cats/mkx.png)
![Konu](/tpl/images/cats/himiya.png)
Chemistry, 30.09.2019 06:30
![Konu](/tpl/images/cats/biologiya.png)
Biology, 30.09.2019 06:30
![Konu](/tpl/images/cats/biologiya.png)
![Konu](/tpl/images/cats/himiya.png)
Chemistry, 30.09.2019 06:30