Question 7 of 8 An e-marketing consultant is hired to determine how long customers spend, on average, on a company's website. If the standard deviation is known from previous studies to be approximately 4.1 minutes, determine the number of customers that needs to be sampled in order to determine the mean length of time spent on the company's website, accurate to within a margin of error of 0.8 minutes, at the 2% level of significance. Standard Normal Distribution Table Number of Customers = Round up to the next whole number