With over 50% of adults spending more than an hour a day on the Internet, the nu
ID: 3364514 • Letter: W
Question
With over 50% of adults spending more than an hour a day on the Internet, the number experiencing computer or Internet-based crime continues to rise. A survey in 2010 of a random sample of 1025 adults, aged 18 and older, reached by random digit dialing found 113 adults in the sample who said that they or a household member was a victim of a computer or Internet crime on their home computer in the past year.
Give the 95% large-sample confidence interval for the proportion p of all households that have experienced computer or Internet crime during the year before the survey was conducted.
Answer 1?
Answer 2? (round both answers to 4 decimal places)
Give the plus four 95% confidence interval for p. Write answer in decimal form.
Answer 1?
Answer 2? (Round both answers to 4 decimal places)
Explanation / Answer
95% 99% n 1,025 1,025 p 0.11024 0.11024 z-value 1.95996 2.57583 SE = sqrt(p*(1-p)/n) 0.00978 0.00978 ME = z * SE 0.01917 0.02520 Lower limit = p - ME 0.09107 0.08505 Upper limit = p + ME 0.12942 0.13544
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