Author Question: In a survey of 1000 Americans, 850 said that they own a cell phone. Assume that the survey was ... (Read 95 times)

Pea0909berry · **on:** May 5, 2020

Question 1

An honest coin is tossed n times. Let the random variable X denote the number of heads tossed. How many tosses n are required to be 97.5% certain that X will be less than

+ 20?
◦ 100
◦ 800
◦ 400
◦ 200
◦ none of these

Question 2

In a survey of 1000 Americans, 850 said that they own a cell phone. Assume that the survey was properly conducted and that the 1000 people surveyed represent an unbiased sample of the entire population. Estimate the standard error for this survey.
◦ ≈ 0.1%
◦ ≈ 11.1%
◦ ≈ 11.3%
◦ ≈ 12.75%
◦ ≈ 1.1%

kescobar@64 · **Reply #1 on:** May 5, 2020

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