Question

n analyst working for a telecommunications company has been asked to gauge the stress on its cellular networks due to the increasing use of smartphones. She decides to first look at the relationship between the number of minutes customers spent talking on their phones and the amount of cellular data they use. She collects a month’s worth of data on 300 customers who have smartphones with data plans. The mean monthly call time was found to be 227 minutes, and the mean amount of data consumed was found to be 510 megabytes. Based on the least squares regression line fitted to the data, it is found that for every minute increase in calling time, the data usage is expected to increase by 4.8 megabytes. Predict the amount of data used by a customer who spends 441 minutes on the phone