As a manager for an advertising company, you must plan a campaign designed to increase twitter usage. a recent survey suggests that 85% of adults know what twitter is. how many adults should you survey in order to be 90% confident that your estimate is within 5% of the true population proportion?

Select the correct answer from each drop-down menu. james needs to clock a minimum of 9 hours per day at work. the data set records his daily work hours, which vary between 9 hours and 12 hours, for a certain number of days. {9, 9.5, 10, 10.5, 10.5, 11, 11, 11.5, 11.5, 11.5, 12, 12}. the median number of hours james worked is . the skew of the distribution is