What percent of users will wait between 4 and 8 seconds for, Ask an Expert

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You are the designer for your company's web site. You have data to indicate that the mean download time for the homepage is 5.8 seconds and that the standard deviation of download time is 2.1 seconds. If we assume that the download times are normally distributed, what percent of users will wait between 4 and 8 seconds for the homepage to download? describe your findings so that your non-quantitative partner will understand them.

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