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.
Answers: 1
Mathematics, 21.06.2019 14:00, holaadios222lol
Which expression is equivalent to? assume x > 0 and y > 0.
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Mathematics, 21.06.2019 20:00, Enaszr9657
Two line segments are shown in the figure below. suppose that the length of the line along the x-axis is 6, and the length of the hypotenuse of the triangle is 10. what is the equation of the hypotenuse line (shown in red, below)?
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The city of Alameda is surveying residents to learn the proportion of smartphone users. They know th...
Mathematics, 27.09.2019 06:30
Mathematics, 27.09.2019 06:30
Mathematics, 27.09.2019 06:30