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# A survey of 850 workers were asked how much they used the Internet at work. 578 said they used the internet within limits, and 255 said that they...

Q-3d. A survey of 850 workers were asked how much they used the Internet at work. 578 said they used the internet within limits, and 255 said that they did not use the Internet at work. Construct a 95% confidence interval estimate for the proportion of all workers who did not use the Internet within limits. Explain your findings so that your non-quantitative partner will understand them. (5 pts.)
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Solution of question 1st
n
P= = 850
255 / 850
0.3
0.7 1- P =
the confidence interval for a proportion of
p ± z σp where p is the proportion in the sample . Z is the value at .05 level and σp is...

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