Question 21·Hard·Inference from Sample Statistics and Margin of Error
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Survey
Mean weekly screen time (hours)
Margin of error (hours)
X
17.3
1.2
Y
18.7
2.5
The results of two independent random surveys of high school students in the same large school district are shown above. Each margin of error was calculated for a 95% confidence level.
Which of the following statements is best supported by the information in the table?
