In January 2025
Answer to Question #314845 in Statistics and Probability for Ren
The average hour spent in computer by 20 senior high school students during online class is 7 hours with a standard deviation of 2 hours. Construct a 98% confidence interval of the average hour spent by all senior high school students. Identify the width of the interval.
"\\mu=7 \\plusmn z_{alpha\/2}\\frac{\\sigma}{\\sqrt{n}}=7 \\plusmn 2.33 \\frac{2}{\\sqrt{20}}=7 \\plusmn 1.04"
width of interval is 1.04x2=2.08
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