(a)
To find: The margin of error for the survey.
The margin of error for the survey is
Given information: A survey of 439 teenagers are given in the United States where 14% said that they worked during their summer vacation.
Formula used: The formula that is used for evaluating the margin of error is
Calculation: The number of teenagers is 439 so one has
Hence the margin of error for the survey is
(b)
To find: Interval that is likely to contain the exact percent of all U.S. teenagers who worked during their summer vacation.
The interval will be
Given information: A survey of 439 teenagers are given in the United States where 14% said that they worked during their summer vacation.
Explanation:
As 14% said they worked during summer vacation so the interval is evaluated as:
Hence the interval will be
Chapter 6 Solutions
Holt Mcdougal Larson Algebra 2: Student Edition 2012
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